Index: Core/Common/src/Core.Common.Gui/Forms/MainWindow/MainWindow.xaml
===================================================================
diff -u -r85053cd7be8aa42587cc2b0e25d6b98b5a5c2893 -r9030d92c81e48283fb8a49f55e770eb48de483d5
--- Core/Common/src/Core.Common.Gui/Forms/MainWindow/MainWindow.xaml	(.../MainWindow.xaml)	(revision 85053cd7be8aa42587cc2b0e25d6b98b5a5c2893)
+++ Core/Common/src/Core.Common.Gui/Forms/MainWindow/MainWindow.xaml	(.../MainWindow.xaml)	(revision 9030d92c81e48283fb8a49f55e770eb48de483d5)
@@ -101,6 +101,11 @@
                                        fluent:KeyTip.Keys="T"
                                        Click="OnFileOptionsClicked" />
 
+                        <fluent:Button Header="{x:Static Properties:Resources.Ribbon_Exit}"
+                                       Icon="/Core.Common.Gui;component\Resources\ClosePreviewHH.png"
+                                       fluent:KeyTip.Keys="X"
+                                       Click="OnFileExitClicked" />
+
                     </fluent:BackstageTabControl>
                 </fluent:Backstage>
             </fluent:Ribbon.Menu>
Index: Core/Common/src/Core.Common.Gui/Forms/MainWindow/MainWindow.xaml.cs
===================================================================
diff -u -r0c64d8a6c718c0aa67403a16c94dd0c10f862455 -r9030d92c81e48283fb8a49f55e770eb48de483d5
--- Core/Common/src/Core.Common.Gui/Forms/MainWindow/MainWindow.xaml.cs	(.../MainWindow.xaml.cs)	(revision 0c64d8a6c718c0aa67403a16c94dd0c10f862455)
+++ Core/Common/src/Core.Common.Gui/Forms/MainWindow/MainWindow.xaml.cs	(.../MainWindow.xaml.cs)	(revision 9030d92c81e48283fb8a49f55e770eb48de483d5)
@@ -700,6 +700,11 @@
             ValidateItems();
         }
 
+        private void OnFileExitClicked(object sender, RoutedEventArgs e)
+        {
+            Gui.Exit();
+        }
+
         private string GetLayoutFilePath()
         {
             string localUserSettingsDirectory = SettingsHelper.GetApplicationLocalUserSettingsDirectory();