Introduce multithreading.

Fix Bugs.

10 files changed, 1249 insertions, 884 deletions

diff --git a/include/MainWindow.h b/include/MainWindow.h
index a6ddfc3a..418a56db 100644
--- a/include/MainWindow.h
+++ b/include/MainWindow.h
@@ -36,6 +36,7 @@
 #include "ui/FindWidget.h"
 #include "ui/Wizard.h"
 #include "ui/KeyUploadDialog.h"
+#include "ui/WaitingDialog.h"
 
 #include "gpg/result_analyse/SignResultAnalyse.h"
 #include "gpg/result_analyse/EncryptResultAnalyse.h"
diff --git a/include/ui/WaitingDialog.h b/include/ui/WaitingDialog.h
new file mode 100644
index 00000000..64c77ad9
--- /dev/null
+++ b/include/ui/WaitingDialog.h
@@ -0,0 +1,40 @@
+/**
+ * This file is part of GPGFrontend.
+ *
+ * GPGFrontend is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Foobar is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Foobar.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The initial version of the source code is inherited from gpg4usb-team.
+ * Their source code version also complies with GNU General Public License.
+ *
+ * The source code version of this software was modified and released
+ * by Saturneric<[email protected]> starting on May 12, 2021.
+ *
+ */
+
+#include "GpgFrontend.h"
+
+class WaitingDialog : public QDialog {
+Q_OBJECT
+public:
+
+    WaitingDialog(QWidget *parent = nullptr);
+
+public slots:
+
+private slots:
+
+private:
+
+
+};
diff --git a/resource/ts/gpg_frontend_fr.ts b/resource/ts/gpg_frontend_fr.ts
index bbd05c12..a32fcc56 100644
--- a/resource/ts/gpg_frontend_fr.ts
+++ b/resource/ts/gpg_frontend_fr.ts
@@ -322,22 +322,22 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="199"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="198"/>
         <source>Warning</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="200"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="199"/>
         <source>Are you sure you want to delete it?</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="210"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="209"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="211"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="210"/>
         <source>Unable to delete the file or folder.</source>
         <translation type="unfinished"></translation>
     </message>
@@ -1937,27 +1937,24 @@ This is NOT your Public Key, so DON&apos;T give it away.&lt;br /&gt;Do you REALL
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="37"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="88"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="220"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="395"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="538"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="681"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="419"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="562"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="705"/>
         <source>No Key Selected</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="44"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="95"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="227"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="402"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="545"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="688"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="426"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="569"/>
         <source>Invalid Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="45"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="403"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="546"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="689"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="427"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="570"/>
         <source>The selected key contains a key that does not actually have a encrypt usage.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
@@ -1967,121 +1964,148 @@ This is NOT your Public Key, so DON&apos;T give it away.&lt;br /&gt;Do you REALL
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="369"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="373"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="377"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="431"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="444"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="448"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="452"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="495"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="511"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="515"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="232"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="717"/>
+        <source>Invalid KeyPair</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="233"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="718"/>
+        <source>The selected keypair cannot be used for signing and encryption at the same time.&lt;br/&gt;</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="244"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="251"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="729"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="736"/>
+        <source>Incomplete Operation</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="245"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="730"/>
+        <source>None of the selected key pairs can provide the encryption function.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="252"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="737"/>
+        <source>None of the selected key pairs can provide the signature function.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="393"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="397"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="401"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="455"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="468"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="472"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="476"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="519"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="574"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="602"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="607"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="611"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="642"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="655"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="659"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="663"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="723"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="734"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="738"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="742"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="535"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="539"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="543"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="598"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="626"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="631"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="635"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="666"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="679"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="683"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="687"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="767"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="778"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="782"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="786"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="830"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="373"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="448"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="515"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="659"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="738"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="397"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="472"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="539"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="683"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="782"/>
         <source>No permission to read this file.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="377"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="452"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="519"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="663"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="742"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="401"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="476"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="543"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="687"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="786"/>
         <source>No permission to create file.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="382"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="467"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="525"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="668"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="406"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="491"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="549"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="692"/>
         <source>Warning</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="383"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="468"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="526"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="669"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="407"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="492"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="550"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="693"/>
         <source>The target file already exists, do you need to overwrite it?</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="431"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="495"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="574"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="642"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="723"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="786"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="455"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="519"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="598"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="666"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="767"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="830"/>
         <source>An error occurred during operation.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="603"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="627"/>
         <source>Please select the appropriate target file or signature file. Ensure that both are in this directory.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="607"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="631"/>
         <source>No permission to read target file.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="611"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="635"/>
         <source>No permission to read signature file.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="734"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="778"/>
         <source>Select a file(.gpg/.asc) before doing it.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="46"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="97"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="229"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="404"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="547"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="690"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="234"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="428"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="571"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="719"/>
         <source>&lt;br/&gt;For example the Following Key: &lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="369"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="444"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="511"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="655"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="393"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="468"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="535"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="679"/>
         <source>Select a file before doing it.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="228"/>
-        <source>The selected key cannot be used for signing and encryption at the same time.&lt;br/&gt;</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
         <location filename="../../src/ui/main_window/MainWindowSlotUI.cpp" line="54"/>
         <source>There is one unencrypted file in attachment folder</source>
         <translation type="unfinished"></translation>
@@ -2118,471 +2142,481 @@ This is NOT your Public Key, so DON&apos;T give it away.&lt;br /&gt;Do you REALL
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="45"/>
+        <source>&amp;Browser</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="47"/>
+        <source>Open a file browser</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="50"/>
         <source>&amp;Save</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="48"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="53"/>
         <source>Save the current File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="51"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="56"/>
         <source>Save &amp;As</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="54"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="59"/>
         <source>Save the current File as...</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="57"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="62"/>
         <source>&amp;Print</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="60"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="65"/>
         <source>Print Document</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="63"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="68"/>
         <source>&amp;Close</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="65"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="70"/>
         <source>Close file</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="68"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="73"/>
         <source>&amp;Quit</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="71"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="76"/>
         <source>Quit Program</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="76"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="81"/>
         <source>&amp;Undo</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="78"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="83"/>
         <source>Undo Last Edit Action</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="81"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="86"/>
         <source>&amp;Redo</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="83"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="88"/>
         <source>Redo Last Edit Action</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="86"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="91"/>
         <source>Zoom In</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="90"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="95"/>
         <source>Zoom Out</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="94"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="99"/>
         <source>&amp;Paste</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="97"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="102"/>
         <source>Paste Text From Clipboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="100"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="105"/>
         <source>Cu&amp;t</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="103"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="108"/>
         <source>Cut the current selection&apos;s contents to the clipboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="107"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="112"/>
         <source>&amp;Copy</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="110"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="115"/>
         <source>Copy the current selection&apos;s contents to the clipboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="114"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="119"/>
         <source>&amp;Quote</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="116"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="121"/>
         <source>Quote whole text</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="119"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="124"/>
         <source>Select &amp;All</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="122"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="127"/>
         <source>Select the whole text</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="125"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="130"/>
         <source>&amp;Find</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="127"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="132"/>
         <source>Find a word</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="130"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="135"/>
         <source>Remove &amp;spacing</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="133"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="138"/>
         <source>Remove double linebreaks, e.g. in pasted text from webmailer</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="136"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="141"/>
         <source>Se&amp;ttings</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="137"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="142"/>
         <source>Open settings dialog</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="143"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="148"/>
         <source>&amp;Encrypt</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="146"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="151"/>
         <source>Encrypt Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="149"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="154"/>
         <source>&amp;Encrypt &amp;Sign</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="152"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="157"/>
         <source>Encrypt and Sign Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="155"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="160"/>
         <source>&amp;Decrypt</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="158"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="163"/>
         <source>Decrypt Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="161"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="166"/>
         <source>&amp;Decrypt &amp;Verify</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="164"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="169"/>
         <source>Decrypt and Verify Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="170"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="175"/>
         <source>&amp;Encrypt File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="171"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="176"/>
         <source>Encrypt File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="174"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="179"/>
         <source>&amp;Decrypt File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="175"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="180"/>
         <source>Decrypt File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="178"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="183"/>
         <source>&amp;Sign File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="179"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="184"/>
         <source>Sign File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="182"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="187"/>
         <source>&amp;Verify File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="183"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="188"/>
         <source>Verify File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="187"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="192"/>
         <source>&amp;Sign</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="190"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="195"/>
         <source>Sign Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="193"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="198"/>
         <source>&amp;Verify</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="196"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="201"/>
         <source>Verify Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="202"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="207"/>
         <source>&amp;Editor</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="204"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="209"/>
         <source>Import New Key From Editor</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="207"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="212"/>
         <source>Manage &amp;keys</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="209"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="214"/>
         <source>Open Keymanagement</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="214"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="219"/>
         <source>&amp;About</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="216"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="221"/>
         <source>Show the application&apos;s About box</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="219"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="224"/>
         <source>Open &amp;Wizard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="220"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="225"/>
         <source>Open the wizard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="225"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="230"/>
         <source>Append Selected Key(s) To Text</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="226"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="231"/>
         <source>Append The Selected Keys To Text in Editor</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="229"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="234"/>
         <source>Copy EMail-address</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="230"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="235"/>
         <source>Copy selected EMailaddress to clipboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="234"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="239"/>
         <source>Show Key Details</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="235"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="240"/>
         <source>Show Details for this Key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="238"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="243"/>
         <source>Refresh Key From Key Server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="239"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="244"/>
         <source>Refresh key from default key server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="242"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="247"/>
         <source>Upload Public Key(s) To Server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="243"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="248"/>
         <source>Upload The Selected Public Keys To Server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="257"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="262"/>
         <source>Remove PGP Header</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="260"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="265"/>
         <source>Add PGP Header</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="265"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="270"/>
         <source>&amp;File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="277"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="283"/>
         <source>&amp;Edit</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="295"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="301"/>
         <source>&amp;File...</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="301"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="307"/>
         <source>&amp;Crypt</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="312"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="318"/>
         <source>&amp;Keys</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="313"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="319"/>
         <source>&amp;Import Key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="322"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="328"/>
         <source>&amp;Steganography</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="331"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="337"/>
         <source>&amp;View</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="333"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="339"/>
         <source>&amp;Help</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="341"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="347"/>
         <source>File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="348"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="355"/>
         <source>Crypt</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="358"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="365"/>
         <source>Key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="363"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="370"/>
         <source>Edit</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="370"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="377"/>
         <source>Special Edit</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="382"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="389"/>
         <source>Import key from...</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="383"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="390"/>
         <source>Import key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="392"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="398"/>
         <source>Browser to view and operate file</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="393"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="399"/>
         <source>Browser</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="411"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="417"/>
         <source>Ready</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="418"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="424"/>
         <source>Key ToolBox</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="426"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="432"/>
         <source>Information Board</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="446"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="452"/>
         <source>Attached files:</source>
         <translation type="unfinished"></translation>
     </message>
diff --git a/resource/ts/gpg_frontend_ru.ts b/resource/ts/gpg_frontend_ru.ts
index 97bed6b7..ccbd15a0 100644
--- a/resource/ts/gpg_frontend_ru.ts
+++ b/resource/ts/gpg_frontend_ru.ts
@@ -322,22 +322,22 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="199"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="198"/>
         <source>Warning</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="200"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="199"/>
         <source>Are you sure you want to delete it?</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="210"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="209"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="211"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="210"/>
         <source>Unable to delete the file or folder.</source>
         <translation type="unfinished"></translation>
     </message>
@@ -1937,27 +1937,24 @@ This is NOT your Public Key, so DON&apos;T give it away.&lt;br /&gt;Do you REALL
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="37"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="88"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="220"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="395"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="538"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="681"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="419"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="562"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="705"/>
         <source>No Key Selected</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="44"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="95"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="227"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="402"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="545"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="688"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="426"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="569"/>
         <source>Invalid Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="45"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="403"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="546"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="689"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="427"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="570"/>
         <source>The selected key contains a key that does not actually have a encrypt usage.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
@@ -1967,121 +1964,148 @@ This is NOT your Public Key, so DON&apos;T give it away.&lt;br /&gt;Do you REALL
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="369"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="373"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="377"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="431"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="444"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="448"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="452"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="495"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="511"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="515"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="232"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="717"/>
+        <source>Invalid KeyPair</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="233"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="718"/>
+        <source>The selected keypair cannot be used for signing and encryption at the same time.&lt;br/&gt;</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="244"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="251"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="729"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="736"/>
+        <source>Incomplete Operation</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="245"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="730"/>
+        <source>None of the selected key pairs can provide the encryption function.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="252"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="737"/>
+        <source>None of the selected key pairs can provide the signature function.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="393"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="397"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="401"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="455"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="468"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="472"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="476"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="519"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="574"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="602"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="607"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="611"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="642"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="655"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="659"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="663"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="723"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="734"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="738"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="742"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="535"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="539"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="543"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="598"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="626"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="631"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="635"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="666"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="679"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="683"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="687"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="767"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="778"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="782"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="786"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="830"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="373"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="448"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="515"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="659"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="738"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="397"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="472"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="539"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="683"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="782"/>
         <source>No permission to read this file.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="377"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="452"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="519"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="663"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="742"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="401"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="476"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="543"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="687"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="786"/>
         <source>No permission to create file.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="382"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="467"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="525"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="668"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="406"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="491"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="549"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="692"/>
         <source>Warning</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="383"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="468"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="526"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="669"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="407"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="492"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="550"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="693"/>
         <source>The target file already exists, do you need to overwrite it?</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="431"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="495"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="574"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="642"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="723"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="786"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="455"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="519"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="598"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="666"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="767"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="830"/>
         <source>An error occurred during operation.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="603"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="627"/>
         <source>Please select the appropriate target file or signature file. Ensure that both are in this directory.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="607"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="631"/>
         <source>No permission to read target file.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="611"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="635"/>
         <source>No permission to read signature file.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="734"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="778"/>
         <source>Select a file(.gpg/.asc) before doing it.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="46"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="97"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="229"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="404"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="547"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="690"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="234"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="428"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="571"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="719"/>
         <source>&lt;br/&gt;For example the Following Key: &lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="369"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="444"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="511"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="655"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="393"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="468"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="535"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="679"/>
         <source>Select a file before doing it.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="228"/>
-        <source>The selected key cannot be used for signing and encryption at the same time.&lt;br/&gt;</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
         <location filename="../../src/ui/main_window/MainWindowSlotUI.cpp" line="54"/>
         <source>There is one unencrypted file in attachment folder</source>
         <translation type="unfinished"></translation>
@@ -2118,471 +2142,481 @@ This is NOT your Public Key, so DON&apos;T give it away.&lt;br /&gt;Do you REALL
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="45"/>
+        <source>&amp;Browser</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="47"/>
+        <source>Open a file browser</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="50"/>
         <source>&amp;Save</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="48"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="53"/>
         <source>Save the current File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="51"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="56"/>
         <source>Save &amp;As</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="54"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="59"/>
         <source>Save the current File as...</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="57"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="62"/>
         <source>&amp;Print</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="60"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="65"/>
         <source>Print Document</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="63"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="68"/>
         <source>&amp;Close</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="65"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="70"/>
         <source>Close file</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="68"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="73"/>
         <source>&amp;Quit</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="71"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="76"/>
         <source>Quit Program</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="76"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="81"/>
         <source>&amp;Undo</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="78"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="83"/>
         <source>Undo Last Edit Action</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="81"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="86"/>
         <source>&amp;Redo</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="83"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="88"/>
         <source>Redo Last Edit Action</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="86"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="91"/>
         <source>Zoom In</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="90"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="95"/>
         <source>Zoom Out</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="94"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="99"/>
         <source>&amp;Paste</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="97"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="102"/>
         <source>Paste Text From Clipboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="100"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="105"/>
         <source>Cu&amp;t</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="103"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="108"/>
         <source>Cut the current selection&apos;s contents to the clipboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="107"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="112"/>
         <source>&amp;Copy</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="110"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="115"/>
         <source>Copy the current selection&apos;s contents to the clipboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="114"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="119"/>
         <source>&amp;Quote</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="116"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="121"/>
         <source>Quote whole text</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="119"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="124"/>
         <source>Select &amp;All</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="122"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="127"/>
         <source>Select the whole text</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="125"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="130"/>
         <source>&amp;Find</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="127"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="132"/>
         <source>Find a word</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="130"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="135"/>
         <source>Remove &amp;spacing</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="133"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="138"/>
         <source>Remove double linebreaks, e.g. in pasted text from webmailer</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="136"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="141"/>
         <source>Se&amp;ttings</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="137"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="142"/>
         <source>Open settings dialog</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="143"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="148"/>
         <source>&amp;Encrypt</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="146"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="151"/>
         <source>Encrypt Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="149"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="154"/>
         <source>&amp;Encrypt &amp;Sign</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="152"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="157"/>
         <source>Encrypt and Sign Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="155"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="160"/>
         <source>&amp;Decrypt</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="158"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="163"/>
         <source>Decrypt Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="161"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="166"/>
         <source>&amp;Decrypt &amp;Verify</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="164"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="169"/>
         <source>Decrypt and Verify Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="170"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="175"/>
         <source>&amp;Encrypt File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="171"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="176"/>
         <source>Encrypt File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="174"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="179"/>
         <source>&amp;Decrypt File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="175"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="180"/>
         <source>Decrypt File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="178"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="183"/>
         <source>&amp;Sign File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="179"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="184"/>
         <source>Sign File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="182"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="187"/>
         <source>&amp;Verify File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="183"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="188"/>
         <source>Verify File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="187"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="192"/>
         <source>&amp;Sign</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="190"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="195"/>
         <source>Sign Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="193"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="198"/>
         <source>&amp;Verify</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="196"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="201"/>
         <source>Verify Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="202"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="207"/>
         <source>&amp;Editor</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="204"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="209"/>
         <source>Import New Key From Editor</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="207"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="212"/>
         <source>Manage &amp;keys</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="209"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="214"/>
         <source>Open Keymanagement</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="214"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="219"/>
         <source>&amp;About</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="216"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="221"/>
         <source>Show the application&apos;s About box</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="219"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="224"/>
         <source>Open &amp;Wizard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="220"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="225"/>
         <source>Open the wizard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="225"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="230"/>
         <source>Append Selected Key(s) To Text</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="226"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="231"/>
         <source>Append The Selected Keys To Text in Editor</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="229"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="234"/>
         <source>Copy EMail-address</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="230"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="235"/>
         <source>Copy selected EMailaddress to clipboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="234"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="239"/>
         <source>Show Key Details</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="235"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="240"/>
         <source>Show Details for this Key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="238"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="243"/>
         <source>Refresh Key From Key Server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="239"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="244"/>
         <source>Refresh key from default key server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="242"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="247"/>
         <source>Upload Public Key(s) To Server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="243"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="248"/>
         <source>Upload The Selected Public Keys To Server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="257"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="262"/>
         <source>Remove PGP Header</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="260"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="265"/>
         <source>Add PGP Header</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="265"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="270"/>
         <source>&amp;File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="277"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="283"/>
         <source>&amp;Edit</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="295"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="301"/>
         <source>&amp;File...</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="301"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="307"/>
         <source>&amp;Crypt</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="312"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="318"/>
         <source>&amp;Keys</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="313"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="319"/>
         <source>&amp;Import Key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="322"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="328"/>
         <source>&amp;Steganography</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="331"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="337"/>
         <source>&amp;View</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="333"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="339"/>
         <source>&amp;Help</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="341"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="347"/>
         <source>File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="348"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="355"/>
         <source>Crypt</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="358"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="365"/>
         <source>Key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="363"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="370"/>
         <source>Edit</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="370"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="377"/>
         <source>Special Edit</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="382"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="389"/>
         <source>Import key from...</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="383"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="390"/>
         <source>Import key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="392"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="398"/>
         <source>Browser to view and operate file</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="393"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="399"/>
         <source>Browser</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="411"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="417"/>
         <source>Ready</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="418"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="424"/>
         <source>Key ToolBox</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="426"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="432"/>
         <source>Information Board</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="446"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="452"/>
         <source>Attached files:</source>
         <translation type="unfinished"></translation>
     </message>
diff --git a/resource/ts/gpgfrontend_en_us.ts b/resource/ts/gpgfrontend_en_us.ts
index 44140c18..c718def2 100644
--- a/resource/ts/gpgfrontend_en_us.ts
+++ b/resource/ts/gpgfrontend_en_us.ts
@@ -322,22 +322,22 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="199"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="198"/>
         <source>Warning</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="200"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="199"/>
         <source>Are you sure you want to delete it?</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="210"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="209"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="211"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="210"/>
         <source>Unable to delete the file or folder.</source>
         <translation type="unfinished"></translation>
     </message>
@@ -1937,27 +1937,24 @@ This is NOT your Public Key, so DON&apos;T give it away.&lt;br /&gt;Do you REALL
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="37"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="88"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="220"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="395"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="538"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="681"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="419"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="562"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="705"/>
         <source>No Key Selected</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="44"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="95"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="227"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="402"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="545"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="688"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="426"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="569"/>
         <source>Invalid Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="45"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="403"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="546"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="689"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="427"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="570"/>
         <source>The selected key contains a key that does not actually have a encrypt usage.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
@@ -1967,121 +1964,148 @@ This is NOT your Public Key, so DON&apos;T give it away.&lt;br /&gt;Do you REALL
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="369"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="373"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="377"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="431"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="444"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="448"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="452"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="495"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="511"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="515"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="232"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="717"/>
+        <source>Invalid KeyPair</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="233"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="718"/>
+        <source>The selected keypair cannot be used for signing and encryption at the same time.&lt;br/&gt;</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="244"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="251"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="729"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="736"/>
+        <source>Incomplete Operation</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="245"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="730"/>
+        <source>None of the selected key pairs can provide the encryption function.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="252"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="737"/>
+        <source>None of the selected key pairs can provide the signature function.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="393"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="397"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="401"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="455"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="468"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="472"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="476"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="519"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="574"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="602"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="607"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="611"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="642"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="655"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="659"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="663"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="723"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="734"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="738"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="742"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="535"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="539"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="543"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="598"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="626"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="631"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="635"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="666"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="679"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="683"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="687"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="767"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="778"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="782"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="786"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="830"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="373"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="448"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="515"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="659"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="738"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="397"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="472"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="539"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="683"/>
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-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="742"/>
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+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="543"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="687"/>
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-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="467"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="525"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="668"/>
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+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="549"/>
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         <source>Warning</source>
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         <source>The target file already exists, do you need to overwrite it?</source>
         <translation type="unfinished"></translation>
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-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="495"/>
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-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="723"/>
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+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="455"/>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="603"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="627"/>
         <source>Please select the appropriate target file or signature file. Ensure that both are in this directory.</source>
         <translation type="unfinished"></translation>
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-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="607"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="631"/>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="611"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="635"/>
         <source>No permission to read signature file.</source>
         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="734"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="778"/>
         <source>Select a file(.gpg/.asc) before doing it.</source>
         <translation type="unfinished"></translation>
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         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="97"/>
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-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="690"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="234"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="428"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="571"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="719"/>
         <source>&lt;br/&gt;For example the Following Key: &lt;br/&gt;</source>
         <translation type="unfinished"></translation>
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-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="444"/>
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-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="655"/>
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+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="535"/>
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-        <source>The selected key cannot be used for signing and encryption at the same time.&lt;br/&gt;</source>
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         <source>There is one unencrypted file in attachment folder</source>
         <translation type="unfinished"></translation>
@@ -2118,471 +2142,481 @@ This is NOT your Public Key, so DON&apos;T give it away.&lt;br /&gt;Do you REALL
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="45"/>
+        <source>&amp;Browser</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="47"/>
+        <source>Open a file browser</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
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         <source>&amp;Save</source>
         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="53"/>
         <source>Save the current File</source>
         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="51"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="56"/>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="54"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="59"/>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="57"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="62"/>
         <source>&amp;Print</source>
         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="65"/>
         <source>Print Document</source>
         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="68"/>
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         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="70"/>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="68"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="73"/>
         <source>&amp;Quit</source>
         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="71"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="76"/>
         <source>Quit Program</source>
         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="81"/>
         <source>&amp;Undo</source>
         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="83"/>
         <source>Undo Last Edit Action</source>
         <translation type="unfinished"></translation>
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     <message>
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         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="88"/>
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         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="91"/>
         <source>Zoom In</source>
         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="95"/>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="94"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="99"/>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="97"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="102"/>
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         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="105"/>
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         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="108"/>
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         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="112"/>
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         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="115"/>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="114"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="119"/>
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         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="121"/>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="119"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="124"/>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="122"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="127"/>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="125"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="130"/>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="127"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="132"/>
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         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="135"/>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="133"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="138"/>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="136"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="141"/>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="137"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="142"/>
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         <translation type="unfinished"></translation>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="148"/>
         <source>&amp;Encrypt</source>
         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="146"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="151"/>
         <source>Encrypt Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="149"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="154"/>
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         <translation type="unfinished"></translation>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="157"/>
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         <translation type="unfinished"></translation>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="160"/>
         <source>&amp;Decrypt</source>
         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="163"/>
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         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="166"/>
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         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="169"/>
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         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="175"/>
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         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="176"/>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="174"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="179"/>
         <source>&amp;Decrypt File</source>
         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="180"/>
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         <translation type="unfinished"></translation>
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     <message>
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         <translation type="unfinished"></translation>
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     <message>
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+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="184"/>
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         <translation type="unfinished"></translation>
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     <message>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="183"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="188"/>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="187"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="192"/>
         <source>&amp;Sign</source>
         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="190"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="195"/>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="193"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="198"/>
         <source>&amp;Verify</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="196"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="201"/>
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         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="202"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="207"/>
         <source>&amp;Editor</source>
         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="204"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="209"/>
         <source>Import New Key From Editor</source>
         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="207"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="212"/>
         <source>Manage &amp;keys</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="209"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="214"/>
         <source>Open Keymanagement</source>
         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="214"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="219"/>
         <source>&amp;About</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="216"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="221"/>
         <source>Show the application&apos;s About box</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="219"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="224"/>
         <source>Open &amp;Wizard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="220"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="225"/>
         <source>Open the wizard</source>
         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="225"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="230"/>
         <source>Append Selected Key(s) To Text</source>
         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="226"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="231"/>
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         <translation type="unfinished"></translation>
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     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="229"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="234"/>
         <source>Copy EMail-address</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="230"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="235"/>
         <source>Copy selected EMailaddress to clipboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="234"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="239"/>
         <source>Show Key Details</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="235"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="240"/>
         <source>Show Details for this Key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="238"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="243"/>
         <source>Refresh Key From Key Server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="239"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="244"/>
         <source>Refresh key from default key server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="242"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="247"/>
         <source>Upload Public Key(s) To Server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="243"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="248"/>
         <source>Upload The Selected Public Keys To Server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="257"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="262"/>
         <source>Remove PGP Header</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="260"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="265"/>
         <source>Add PGP Header</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="265"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="270"/>
         <source>&amp;File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="277"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="283"/>
         <source>&amp;Edit</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="295"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="301"/>
         <source>&amp;File...</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="301"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="307"/>
         <source>&amp;Crypt</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="312"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="318"/>
         <source>&amp;Keys</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="313"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="319"/>
         <source>&amp;Import Key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="322"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="328"/>
         <source>&amp;Steganography</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="331"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="337"/>
         <source>&amp;View</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="333"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="339"/>
         <source>&amp;Help</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="341"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="347"/>
         <source>File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="348"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="355"/>
         <source>Crypt</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="358"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="365"/>
         <source>Key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="363"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="370"/>
         <source>Edit</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="370"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="377"/>
         <source>Special Edit</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="382"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="389"/>
         <source>Import key from...</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="383"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="390"/>
         <source>Import key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="392"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="398"/>
         <source>Browser to view and operate file</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="393"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="399"/>
         <source>Browser</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="411"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="417"/>
         <source>Ready</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="418"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="424"/>
         <source>Key ToolBox</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="426"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="432"/>
         <source>Information Board</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="446"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="452"/>
         <source>Attached files:</source>
         <translation type="unfinished"></translation>
     </message>
diff --git a/resource/ts/gpgfrontend_zh_chs.ts b/resource/ts/gpgfrontend_zh_chs.ts
index 282cb9a4..7bf4bd62 100644
--- a/resource/ts/gpgfrontend_zh_chs.ts
+++ b/resource/ts/gpgfrontend_zh_chs.ts
@@ -322,22 +322,22 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="199"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="198"/>
         <source>Warning</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="200"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="199"/>
         <source>Are you sure you want to delete it?</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="210"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="209"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="211"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="210"/>
         <source>Unable to delete the file or folder.</source>
         <translation type="unfinished"></translation>
     </message>
@@ -1937,27 +1937,24 @@ This is NOT your Public Key, so DON&apos;T give it away.&lt;br /&gt;Do you REALL
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="37"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="88"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="220"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="395"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="538"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="681"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="419"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="562"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="705"/>
         <source>No Key Selected</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="44"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="95"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="227"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="402"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="545"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="688"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="426"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="569"/>
         <source>Invalid Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="45"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="403"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="546"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="689"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="427"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="570"/>
         <source>The selected key contains a key that does not actually have a encrypt usage.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
@@ -1967,121 +1964,148 @@ This is NOT your Public Key, so DON&apos;T give it away.&lt;br /&gt;Do you REALL
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="369"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="373"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="377"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="431"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="444"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="448"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="452"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="495"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="511"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="515"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="232"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="717"/>
+        <source>Invalid KeyPair</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="233"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="718"/>
+        <source>The selected keypair cannot be used for signing and encryption at the same time.&lt;br/&gt;</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="244"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="251"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="729"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="736"/>
+        <source>Incomplete Operation</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="245"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="730"/>
+        <source>None of the selected key pairs can provide the encryption function.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="252"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="737"/>
+        <source>None of the selected key pairs can provide the signature function.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="393"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="397"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="401"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="455"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="468"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="472"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="476"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="519"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="574"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="602"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="607"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="611"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="642"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="655"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="659"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="663"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="723"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="734"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="738"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="742"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="535"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="539"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="543"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="598"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="626"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="631"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="635"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="666"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="679"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="683"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="687"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="767"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="778"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="782"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="786"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="830"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="373"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="448"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="515"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="659"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="738"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="397"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="472"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="539"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="683"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="782"/>
         <source>No permission to read this file.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="377"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="452"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="519"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="663"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="742"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="401"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="476"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="543"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="687"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="786"/>
         <source>No permission to create file.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="382"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="467"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="525"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="668"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="406"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="491"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="549"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="692"/>
         <source>Warning</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="383"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="468"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="526"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="669"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="407"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="492"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="550"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="693"/>
         <source>The target file already exists, do you need to overwrite it?</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="431"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="495"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="574"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="642"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="723"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="786"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="455"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="519"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="598"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="666"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="767"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="830"/>
         <source>An error occurred during operation.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="603"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="627"/>
         <source>Please select the appropriate target file or signature file. Ensure that both are in this directory.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="607"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="631"/>
         <source>No permission to read target file.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="611"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="635"/>
         <source>No permission to read signature file.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="734"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="778"/>
         <source>Select a file(.gpg/.asc) before doing it.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="46"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="97"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="229"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="404"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="547"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="690"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="234"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="428"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="571"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="719"/>
         <source>&lt;br/&gt;For example the Following Key: &lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="369"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="444"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="511"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="655"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="393"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="468"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="535"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="679"/>
         <source>Select a file before doing it.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="228"/>
-        <source>The selected key cannot be used for signing and encryption at the same time.&lt;br/&gt;</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
         <location filename="../../src/ui/main_window/MainWindowSlotUI.cpp" line="54"/>
         <source>There is one unencrypted file in attachment folder</source>
         <translation type="unfinished"></translation>
@@ -2118,471 +2142,481 @@ This is NOT your Public Key, so DON&apos;T give it away.&lt;br /&gt;Do you REALL
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="45"/>
+        <source>&amp;Browser</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="47"/>
+        <source>Open a file browser</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="50"/>
         <source>&amp;Save</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="48"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="53"/>
         <source>Save the current File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="51"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="56"/>
         <source>Save &amp;As</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="54"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="59"/>
         <source>Save the current File as...</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="57"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="62"/>
         <source>&amp;Print</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="60"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="65"/>
         <source>Print Document</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="63"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="68"/>
         <source>&amp;Close</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="65"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="70"/>
         <source>Close file</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="68"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="73"/>
         <source>&amp;Quit</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="71"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="76"/>
         <source>Quit Program</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="76"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="81"/>
         <source>&amp;Undo</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="78"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="83"/>
         <source>Undo Last Edit Action</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="81"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="86"/>
         <source>&amp;Redo</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="83"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="88"/>
         <source>Redo Last Edit Action</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="86"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="91"/>
         <source>Zoom In</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="90"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="95"/>
         <source>Zoom Out</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="94"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="99"/>
         <source>&amp;Paste</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="97"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="102"/>
         <source>Paste Text From Clipboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="100"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="105"/>
         <source>Cu&amp;t</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="103"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="108"/>
         <source>Cut the current selection&apos;s contents to the clipboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="107"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="112"/>
         <source>&amp;Copy</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="110"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="115"/>
         <source>Copy the current selection&apos;s contents to the clipboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="114"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="119"/>
         <source>&amp;Quote</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="116"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="121"/>
         <source>Quote whole text</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="119"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="124"/>
         <source>Select &amp;All</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="122"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="127"/>
         <source>Select the whole text</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="125"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="130"/>
         <source>&amp;Find</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="127"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="132"/>
         <source>Find a word</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="130"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="135"/>
         <source>Remove &amp;spacing</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="133"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="138"/>
         <source>Remove double linebreaks, e.g. in pasted text from webmailer</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="136"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="141"/>
         <source>Se&amp;ttings</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="137"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="142"/>
         <source>Open settings dialog</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="143"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="148"/>
         <source>&amp;Encrypt</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="146"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="151"/>
         <source>Encrypt Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="149"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="154"/>
         <source>&amp;Encrypt &amp;Sign</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="152"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="157"/>
         <source>Encrypt and Sign Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="155"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="160"/>
         <source>&amp;Decrypt</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="158"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="163"/>
         <source>Decrypt Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="161"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="166"/>
         <source>&amp;Decrypt &amp;Verify</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="164"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="169"/>
         <source>Decrypt and Verify Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="170"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="175"/>
         <source>&amp;Encrypt File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="171"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="176"/>
         <source>Encrypt File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="174"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="179"/>
         <source>&amp;Decrypt File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="175"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="180"/>
         <source>Decrypt File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="178"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="183"/>
         <source>&amp;Sign File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="179"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="184"/>
         <source>Sign File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="182"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="187"/>
         <source>&amp;Verify File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="183"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="188"/>
         <source>Verify File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="187"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="192"/>
         <source>&amp;Sign</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="190"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="195"/>
         <source>Sign Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="193"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="198"/>
         <source>&amp;Verify</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="196"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="201"/>
         <source>Verify Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="202"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="207"/>
         <source>&amp;Editor</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="204"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="209"/>
         <source>Import New Key From Editor</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="207"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="212"/>
         <source>Manage &amp;keys</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="209"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="214"/>
         <source>Open Keymanagement</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="214"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="219"/>
         <source>&amp;About</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="216"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="221"/>
         <source>Show the application&apos;s About box</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="219"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="224"/>
         <source>Open &amp;Wizard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="220"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="225"/>
         <source>Open the wizard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="225"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="230"/>
         <source>Append Selected Key(s) To Text</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="226"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="231"/>
         <source>Append The Selected Keys To Text in Editor</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="229"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="234"/>
         <source>Copy EMail-address</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="230"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="235"/>
         <source>Copy selected EMailaddress to clipboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="234"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="239"/>
         <source>Show Key Details</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="235"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="240"/>
         <source>Show Details for this Key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="238"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="243"/>
         <source>Refresh Key From Key Server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="239"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="244"/>
         <source>Refresh key from default key server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="242"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="247"/>
         <source>Upload Public Key(s) To Server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="243"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="248"/>
         <source>Upload The Selected Public Keys To Server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="257"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="262"/>
         <source>Remove PGP Header</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="260"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="265"/>
         <source>Add PGP Header</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="265"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="270"/>
         <source>&amp;File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="277"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="283"/>
         <source>&amp;Edit</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="295"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="301"/>
         <source>&amp;File...</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="301"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="307"/>
         <source>&amp;Crypt</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="312"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="318"/>
         <source>&amp;Keys</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="313"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="319"/>
         <source>&amp;Import Key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="322"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="328"/>
         <source>&amp;Steganography</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="331"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="337"/>
         <source>&amp;View</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="333"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="339"/>
         <source>&amp;Help</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="341"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="347"/>
         <source>File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="348"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="355"/>
         <source>Crypt</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="358"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="365"/>
         <source>Key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="363"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="370"/>
         <source>Edit</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="370"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="377"/>
         <source>Special Edit</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="382"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="389"/>
         <source>Import key from...</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="383"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="390"/>
         <source>Import key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="392"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="398"/>
         <source>Browser to view and operate file</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="393"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="399"/>
         <source>Browser</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="411"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="417"/>
         <source>Ready</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="418"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="424"/>
         <source>Key ToolBox</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="426"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="432"/>
         <source>Information Board</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="446"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="452"/>
         <source>Attached files:</source>
         <translation type="unfinished"></translation>
     </message>
diff --git a/resource/ts/gpgfrontend_zh_cht.ts b/resource/ts/gpgfrontend_zh_cht.ts
index 282cb9a4..7bf4bd62 100644
--- a/resource/ts/gpgfrontend_zh_cht.ts
+++ b/resource/ts/gpgfrontend_zh_cht.ts
@@ -322,22 +322,22 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="199"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="198"/>
         <source>Warning</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="200"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="199"/>
         <source>Are you sure you want to delete it?</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="210"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="209"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/widgets/FilePage.cpp" line="211"/>
+        <location filename="../../src/ui/widgets/FilePage.cpp" line="210"/>
         <source>Unable to delete the file or folder.</source>
         <translation type="unfinished"></translation>
     </message>
@@ -1937,27 +1937,24 @@ This is NOT your Public Key, so DON&apos;T give it away.&lt;br /&gt;Do you REALL
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="37"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="88"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="220"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="395"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="538"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="681"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="419"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="562"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="705"/>
         <source>No Key Selected</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="44"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="95"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="227"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="402"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="545"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="688"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="426"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="569"/>
         <source>Invalid Operation</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="45"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="403"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="546"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="689"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="427"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="570"/>
         <source>The selected key contains a key that does not actually have a encrypt usage.&lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
@@ -1967,121 +1964,148 @@ This is NOT your Public Key, so DON&apos;T give it away.&lt;br /&gt;Do you REALL
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="369"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="373"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="377"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="431"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="444"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="448"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="452"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="495"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="511"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="515"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="232"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="717"/>
+        <source>Invalid KeyPair</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="233"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="718"/>
+        <source>The selected keypair cannot be used for signing and encryption at the same time.&lt;br/&gt;</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="244"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="251"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="729"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="736"/>
+        <source>Incomplete Operation</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="245"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="730"/>
+        <source>None of the selected key pairs can provide the encryption function.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="252"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="737"/>
+        <source>None of the selected key pairs can provide the signature function.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="393"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="397"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="401"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="455"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="468"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="472"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="476"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="519"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="574"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="602"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="607"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="611"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="642"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="655"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="659"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="663"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="723"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="734"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="738"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="742"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="535"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="539"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="543"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="598"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="626"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="631"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="635"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="666"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="679"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="683"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="687"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="767"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="778"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="782"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="786"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="830"/>
         <source>Error</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="373"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="448"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="515"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="659"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="738"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="397"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="472"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="539"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="683"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="782"/>
         <source>No permission to read this file.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="377"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="452"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="519"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="663"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="742"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="401"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="476"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="543"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="687"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="786"/>
         <source>No permission to create file.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="382"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="467"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="525"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="668"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="406"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="491"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="549"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="692"/>
         <source>Warning</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="383"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="468"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="526"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="669"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="407"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="492"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="550"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="693"/>
         <source>The target file already exists, do you need to overwrite it?</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="431"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="495"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="574"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="642"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="723"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="786"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="455"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="519"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="598"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="666"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="767"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="830"/>
         <source>An error occurred during operation.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="603"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="627"/>
         <source>Please select the appropriate target file or signature file. Ensure that both are in this directory.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="607"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="631"/>
         <source>No permission to read target file.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="611"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="635"/>
         <source>No permission to read signature file.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="734"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="778"/>
         <source>Select a file(.gpg/.asc) before doing it.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="46"/>
         <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="97"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="229"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="404"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="547"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="690"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="234"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="428"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="571"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="719"/>
         <source>&lt;br/&gt;For example the Following Key: &lt;br/&gt;</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="369"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="444"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="511"/>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="655"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="393"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="468"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="535"/>
+        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="679"/>
         <source>Select a file before doing it.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowSlotFunction.cpp" line="228"/>
-        <source>The selected key cannot be used for signing and encryption at the same time.&lt;br/&gt;</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
         <location filename="../../src/ui/main_window/MainWindowSlotUI.cpp" line="54"/>
         <source>There is one unencrypted file in attachment folder</source>
         <translation type="unfinished"></translation>
@@ -2118,471 +2142,481 @@ This is NOT your Public Key, so DON&apos;T give it away.&lt;br /&gt;Do you REALL
     </message>
     <message>
         <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="45"/>
+        <source>&amp;Browser</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="47"/>
+        <source>Open a file browser</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="50"/>
         <source>&amp;Save</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="48"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="53"/>
         <source>Save the current File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="51"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="56"/>
         <source>Save &amp;As</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="54"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="59"/>
         <source>Save the current File as...</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="57"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="62"/>
         <source>&amp;Print</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="60"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="65"/>
         <source>Print Document</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="63"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="68"/>
         <source>&amp;Close</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="65"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="70"/>
         <source>Close file</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="68"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="73"/>
         <source>&amp;Quit</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="71"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="76"/>
         <source>Quit Program</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="76"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="81"/>
         <source>&amp;Undo</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="78"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="83"/>
         <source>Undo Last Edit Action</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="81"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="86"/>
         <source>&amp;Redo</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="83"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="88"/>
         <source>Redo Last Edit Action</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="86"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="91"/>
         <source>Zoom In</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="90"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="95"/>
         <source>Zoom Out</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="94"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="99"/>
         <source>&amp;Paste</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="97"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="102"/>
         <source>Paste Text From Clipboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="100"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="105"/>
         <source>Cu&amp;t</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="103"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="108"/>
         <source>Cut the current selection&apos;s contents to the clipboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="107"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="112"/>
         <source>&amp;Copy</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="110"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="115"/>
         <source>Copy the current selection&apos;s contents to the clipboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="114"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="119"/>
         <source>&amp;Quote</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="116"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="121"/>
         <source>Quote whole text</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="119"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="124"/>
         <source>Select &amp;All</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="122"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="127"/>
         <source>Select the whole text</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="125"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="130"/>
         <source>&amp;Find</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="127"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="132"/>
         <source>Find a word</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="130"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="135"/>
         <source>Remove &amp;spacing</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="133"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="138"/>
         <source>Remove double linebreaks, e.g. in pasted text from webmailer</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="136"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="141"/>
         <source>Se&amp;ttings</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="137"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="142"/>
         <source>Open settings dialog</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="143"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="148"/>
         <source>&amp;Encrypt</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="146"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="151"/>
         <source>Encrypt Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="149"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="154"/>
         <source>&amp;Encrypt &amp;Sign</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="152"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="157"/>
         <source>Encrypt and Sign Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="155"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="160"/>
         <source>&amp;Decrypt</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="158"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="163"/>
         <source>Decrypt Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="161"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="166"/>
         <source>&amp;Decrypt &amp;Verify</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="164"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="169"/>
         <source>Decrypt and Verify Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="170"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="175"/>
         <source>&amp;Encrypt File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="171"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="176"/>
         <source>Encrypt File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="174"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="179"/>
         <source>&amp;Decrypt File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="175"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="180"/>
         <source>Decrypt File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="178"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="183"/>
         <source>&amp;Sign File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="179"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="184"/>
         <source>Sign File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="182"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="187"/>
         <source>&amp;Verify File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="183"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="188"/>
         <source>Verify File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="187"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="192"/>
         <source>&amp;Sign</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="190"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="195"/>
         <source>Sign Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="193"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="198"/>
         <source>&amp;Verify</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="196"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="201"/>
         <source>Verify Message</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="202"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="207"/>
         <source>&amp;Editor</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="204"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="209"/>
         <source>Import New Key From Editor</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="207"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="212"/>
         <source>Manage &amp;keys</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="209"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="214"/>
         <source>Open Keymanagement</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="214"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="219"/>
         <source>&amp;About</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="216"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="221"/>
         <source>Show the application&apos;s About box</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="219"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="224"/>
         <source>Open &amp;Wizard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="220"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="225"/>
         <source>Open the wizard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="225"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="230"/>
         <source>Append Selected Key(s) To Text</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="226"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="231"/>
         <source>Append The Selected Keys To Text in Editor</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="229"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="234"/>
         <source>Copy EMail-address</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="230"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="235"/>
         <source>Copy selected EMailaddress to clipboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="234"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="239"/>
         <source>Show Key Details</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="235"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="240"/>
         <source>Show Details for this Key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="238"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="243"/>
         <source>Refresh Key From Key Server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="239"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="244"/>
         <source>Refresh key from default key server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="242"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="247"/>
         <source>Upload Public Key(s) To Server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="243"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="248"/>
         <source>Upload The Selected Public Keys To Server</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="257"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="262"/>
         <source>Remove PGP Header</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="260"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="265"/>
         <source>Add PGP Header</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="265"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="270"/>
         <source>&amp;File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="277"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="283"/>
         <source>&amp;Edit</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="295"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="301"/>
         <source>&amp;File...</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="301"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="307"/>
         <source>&amp;Crypt</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="312"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="318"/>
         <source>&amp;Keys</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="313"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="319"/>
         <source>&amp;Import Key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="322"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="328"/>
         <source>&amp;Steganography</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="331"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="337"/>
         <source>&amp;View</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="333"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="339"/>
         <source>&amp;Help</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="341"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="347"/>
         <source>File</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="348"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="355"/>
         <source>Crypt</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="358"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="365"/>
         <source>Key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="363"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="370"/>
         <source>Edit</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="370"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="377"/>
         <source>Special Edit</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="382"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="389"/>
         <source>Import key from...</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="383"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="390"/>
         <source>Import key</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="392"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="398"/>
         <source>Browser to view and operate file</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="393"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="399"/>
         <source>Browser</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="411"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="417"/>
         <source>Ready</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="418"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="424"/>
         <source>Key ToolBox</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="426"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="432"/>
         <source>Information Board</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="446"/>
+        <location filename="../../src/ui/main_window/MainWindowUI.cpp" line="452"/>
         <source>Attached files:</source>
         <translation type="unfinished"></translation>
     </message>
diff --git a/src/gpg/GpgFileOpera.cpp b/src/gpg/GpgFileOpera.cpp
index f7db9d44..ee2f1e0d 100644
--- a/src/gpg/GpgFileOpera.cpp
+++ b/src/gpg/GpgFileOpera.cpp
@@ -142,24 +142,25 @@ gpgme_error_t GpgFileOpera::verifyFile(GpgME::GpgContext *ctx, const QString &mP
     if (!infile.open(QIODevice::ReadOnly))
         throw std::runtime_error("cannot open file");
 
-
     QByteArray inBuffer = infile.readAll();
 
-    QFile signFile;
-    signFile.setFileName(mPath + ".sig");
-    if (!signFile.open(QIODevice::ReadOnly)) {
-        throw std::runtime_error("cannot open file");
+    if(fileInfo.suffix() == "gpg") {
+        auto error = ctx->verify(&inBuffer, nullptr, result);
+        return error;
     }
+    else {
+        QFile signFile;
+        signFile.setFileName(mPath + ".sig");
+        if (!signFile.open(QIODevice::ReadOnly)) {
+            throw std::runtime_error("cannot open file");
+        }
 
+        auto signBuffer = signFile.readAll();
+        infile.close();
 
-
-    auto signBuffer = signFile.readAll();
-    infile.close();
-
-
-    auto error = ctx->verify(&inBuffer, &signBuffer, result);
-
-    return error;
+        auto error = ctx->verify(&inBuffer, &signBuffer, result);
+        return error;
+    }
 }
 
 gpg_error_t GpgFileOpera::encryptSignFile(GpgME::GpgContext *ctx, QVector<GpgKey> &keys, const QString &mPath,
diff --git a/src/ui/WaitingDialog.cpp b/src/ui/WaitingDialog.cpp
new file mode 100644
index 00000000..8281385a
--- /dev/null
+++ b/src/ui/WaitingDialog.cpp
@@ -0,0 +1,15 @@
+#include "ui/WaitingDialog.h"
+
+WaitingDialog::WaitingDialog(QWidget *parent) : QDialog(parent) {
+    auto *pb = new QProgressBar();
+    pb->setRange(0, 0);
+
+    auto *layout = new QVBoxLayout();
+    layout->addWidget(pb);
+    this->setLayout(layout);
+
+    this->setModal(true);
+    this->setWindowTitle(tr("Processing"));
+    this->setFixedSize(240, 42);
+    this->show();
+}
diff --git a/src/ui/main_window/MainWindowSlotFunction.cpp b/src/ui/main_window/MainWindowSlotFunction.cpp
index fdf6738f..36d8f363 100644
--- a/src/ui/main_window/MainWindowSlotFunction.cpp
+++ b/src/ui/main_window/MainWindowSlotFunction.cpp
@@ -52,7 +52,22 @@ void MainWindow::slotEncrypt() {
         auto *tmp = new QByteArray();
 
         gpgme_encrypt_result_t result = nullptr;
-        auto error = mCtx->encrypt(keys, edit->curTextPage()->toPlainText().toUtf8(), tmp, &result);
+
+        gpgme_error_t error;
+
+        auto thread = QThread::create([&]() {
+            error = mCtx->encrypt(keys, edit->curTextPage()->toPlainText().toUtf8(), tmp, &result);
+        });
+
+        thread->start();
+
+        WaitingDialog *dialog = new WaitingDialog(this);
+
+        while(thread->isRunning()) {
+            QApplication::processEvents();
+        }
+
+        dialog->close();
 
         auto resultAnalyse = new EncryptResultAnalyse(error, result);
         auto &reportText = resultAnalyse->getResultReport();
@@ -133,8 +148,21 @@ void MainWindow::slotDecrypt() {
         GpgME::GpgContext::preventNoDataErr(&text);
 
         gpgme_decrypt_result_t result = nullptr;
-        // try decrypt, if fail do nothing, especially don't replace text
-        auto error = mCtx->decrypt(text, decrypted, &result);
+
+        gpgme_error_t error;
+        auto thread = QThread::create([&]() {
+            // try decrypt, if fail do nothing, especially don't replace text
+            error = mCtx->decrypt(text, decrypted, &result);
+        });
+        thread->start();
+
+        WaitingDialog *dialog = new WaitingDialog(this);
+        while(thread->isRunning()) {
+            QApplication::processEvents();
+        }
+
+        dialog->close();
+
         infoBoard->associateTextEdit(edit->curTextPage());
 
         if (gpgme_err_code(error) == GPG_ERR_NO_ERROR)
@@ -181,7 +209,18 @@ void MainWindow::slotVerify() {
 
         gpgme_verify_result_t result;
 
-        auto error = mCtx->verify(&text, nullptr, &result);
+        gpgme_error_t error;
+        auto thread = QThread::create([&]() {
+            error = mCtx->verify(&text, nullptr, &result);
+        });
+        thread->start();
+
+        WaitingDialog *dialog = new WaitingDialog(this);
+        while(thread->isRunning()) {
+            QApplication::processEvents();
+        }
+
+        dialog->close();
 
         auto resultAnalyse = new VerifyResultAnalyse(mCtx, error, result);
         infoBoard->associateTextEdit(edit->curTextPage());
@@ -256,8 +295,21 @@ void MainWindow::slotEncryptSign() {
         gpgme_encrypt_result_t encr_result = nullptr;
         gpgme_sign_result_t sign_result = nullptr;
 
-        auto error = mCtx->encryptSign(keys, edit->curTextPage()->toPlainText().toUtf8(), tmp, &encr_result,
+        gpgme_decrypt_result_t result = nullptr;
+
+        gpgme_error_t error;
+        auto thread = QThread::create([&]() {
+            error = mCtx->encryptSign(keys, edit->curTextPage()->toPlainText().toUtf8(), tmp, &encr_result,
                                        &sign_result);
+        });
+        thread->start();
+
+        WaitingDialog *dialog = new WaitingDialog(this);
+        while(thread->isRunning()) {
+            QApplication::processEvents();
+        }
+
+        dialog->close();
 
         if(gpgme_err_code(error) == GPG_ERR_NO_ERROR) {
             auto *tmp2 = new QString(*tmp);
@@ -297,8 +349,20 @@ void MainWindow::slotDecryptVerify() {
 
         gpgme_decrypt_result_t d_result = nullptr;
         gpgme_verify_result_t v_result = nullptr;
-        // try decrypt, if fail do nothing, especially don't replace text
-        auto error = mCtx->decryptVerify(text, decrypted, &d_result, &v_result);
+
+        gpgme_error_t error;
+        auto thread = QThread::create([&]() {
+            error = mCtx->decryptVerify(text, decrypted, &d_result, &v_result);
+        });
+        thread->start();
+
+        WaitingDialog *dialog = new WaitingDialog(this);
+        while(thread->isRunning()) {
+            QApplication::processEvents();
+        }
+
+        dialog->close();
+
         infoBoard->associateTextEdit(edit->curTextPage());
 
         if (gpgme_err_code(error) == GPG_ERR_NO_ERROR)
@@ -433,7 +497,19 @@ void MainWindow::slotFileEncrypt() {
 
     try {
         gpgme_encrypt_result_t result;
-        auto error = GpgFileOpera::encryptFile(mCtx, keys, path, &result);
+
+        gpgme_error_t error;
+        auto thread = QThread::create([&]() {
+            error = GpgFileOpera::encryptFile(mCtx, keys, path, &result);
+        });
+        thread->start();
+
+        WaitingDialog *dialog = new WaitingDialog(this);
+        while(thread->isRunning()) {
+            QApplication::processEvents();
+        }
+
+        dialog->close();
 
         auto resultAnalyse = new EncryptResultAnalyse(error, result);
         auto &reportText = resultAnalyse->getResultReport();
@@ -451,7 +527,7 @@ void MainWindow::slotFileEncrypt() {
 
         fileTreeView->update();
 
-    } catch (std::runtime_error &e) {
+    } catch (const std::runtime_error &e) {
         QMessageBox::critical(this, tr("Error"), tr("An error occurred during operation."));
     }
 
@@ -498,7 +574,18 @@ void MainWindow::slotFileDecrypt() {
 
     try {
         gpgme_decrypt_result_t result;
-        auto error = GpgFileOpera::decryptFile(mCtx, path, &result);
+        gpgme_error_t error;
+        auto thread = QThread::create([&]() {
+            error = GpgFileOpera::decryptFile(mCtx, path, &result);
+        });
+        thread->start();
+
+        WaitingDialog *dialog = new WaitingDialog(this);
+        while(thread->isRunning()) {
+            QApplication::processEvents();
+        }
+
+        dialog->close();
 
         auto resultAnalyse = new DecryptResultAnalyse(mCtx, error, result);
         auto &reportText = resultAnalyse->getResultReport();
@@ -515,7 +602,7 @@ void MainWindow::slotFileDecrypt() {
         delete resultAnalyse;
 
         fileTreeView->update();
-    } catch (std::runtime_error &e) {
+    } catch (const std::runtime_error &e) {
         QMessageBox::critical(this, tr("Error"), tr("An error occurred during operation."));
         return;
     }
@@ -576,7 +663,18 @@ void MainWindow::slotFileSign() {
 
     try {
         gpgme_sign_result_t result;
-        auto error = GpgFileOpera::signFile(mCtx, keys, path, &result);
+        gpgme_error_t error;
+        auto thread = QThread::create([&]() {
+            error = GpgFileOpera::signFile(mCtx, keys, path, &result);
+        });
+        thread->start();
+
+        WaitingDialog *dialog = new WaitingDialog(this);
+        while(thread->isRunning()) {
+            QApplication::processEvents();
+        }
+
+        dialog->close();
 
         auto resultAnalyse = new SignResultAnalyse(error, result);
         auto &reportText = resultAnalyse->getResultReport();
@@ -594,7 +692,7 @@ void MainWindow::slotFileSign() {
 
         fileTreeView->update();
 
-    } catch (std::runtime_error &e) {
+    } catch (const std::runtime_error &e) {
         QMessageBox::critical(this, tr("Error"), tr("An error occurred during operation."));
     }
 
@@ -611,7 +709,11 @@ void MainWindow::slotFileVerify() {
 
     QString signFilePath, dataFilePath;
 
-    if (fileInfo.suffix() == "sig" || fileInfo.suffix() == "gpg") {
+    if(fileInfo.suffix() == "gpg") {
+        dataFilePath = path;
+        signFilePath = path;
+    }
+    else if (fileInfo.suffix() == "sig") {
         int pos = path.lastIndexOf(QChar('.'));
         dataFilePath = path.left(pos);
         signFilePath = path;
@@ -636,10 +738,26 @@ void MainWindow::slotFileVerify() {
         return;
     }
 
-    try {
-        gpgme_verify_result_t result;
-        auto error = GpgFileOpera::verifyFile(mCtx, dataFilePath, &result);
+    gpgme_verify_result_t result;
+
+    gpgme_error_t error;
+    bool if_error = false;
+    auto thread = QThread::create([&]() {
+        try{
+            error = GpgFileOpera::verifyFile(mCtx, dataFilePath, &result);
+        } catch (const std::runtime_error &e) {
+            if_error = true;
+        }
+    });
+    thread->start();
 
+    WaitingDialog *dialog = new WaitingDialog(this);
+    while(thread->isRunning()) {
+        QApplication::processEvents();
+    }
+    dialog->close();
+
+    if(!if_error) {
         auto resultAnalyse = new VerifyResultAnalyse(mCtx, error, result);
         auto &reportText = resultAnalyse->getResultReport();
         infoBoard->associateTabWidget(edit->tabWidget);
@@ -662,7 +780,7 @@ void MainWindow::slotFileVerify() {
         delete resultAnalyse;
 
         fileTreeView->update();
-    } catch (std::runtime_error &e) {
+    } else {
         QMessageBox::critical(this, tr("Error"), tr("An error occurred during operation."));
         return;
     }
@@ -742,7 +860,17 @@ void MainWindow::slotFileEncryptSign() {
         gpgme_encrypt_result_t encr_result = nullptr;
         gpgme_sign_result_t sign_result = nullptr;
 
-        auto error = GpgFileOpera::encryptSignFile(mCtx, keys, path, &encr_result, &sign_result);
+        gpgme_error_t error;
+        auto thread = QThread::create([&]() {
+            error = GpgFileOpera::encryptSignFile(mCtx, keys, path, &encr_result, &sign_result);
+        });
+        thread->start();
+
+        WaitingDialog *dialog = new WaitingDialog(this);
+        while(thread->isRunning()) {
+            QApplication::processEvents();
+        }
+        dialog->close();
 
         auto resultAnalyseEncr = new EncryptResultAnalyse(error, encr_result);
         auto resultAnalyseSign = new SignResultAnalyse(error, sign_result);
@@ -800,8 +928,18 @@ void MainWindow::slotFileDecryptVerify() {
 
         gpgme_decrypt_result_t d_result = nullptr;
         gpgme_verify_result_t v_result = nullptr;
-        // try decrypt, if fail do nothing, especially don't replace text
-        auto error = GpgFileOpera::decryptVerifyFile(mCtx, path, &d_result, &v_result);
+
+        gpgme_error_t error;
+        auto thread = QThread::create([&]() {
+            error = GpgFileOpera::decryptVerifyFile(mCtx, path, &d_result, &v_result);
+        });
+        thread->start();
+
+        WaitingDialog *dialog = new WaitingDialog(this);
+        while(thread->isRunning()) {
+            QApplication::processEvents();
+        }
+        dialog->close();
         infoBoard->associateFileTreeView(edit->curFilePage());
 
         auto resultAnalyseDecrypt = new DecryptResultAnalyse(mCtx, error, d_result);