Index: Core/Common/src/Core.Common.Gui/Forms/MainWindow/MainWindow.xaml.cs
===================================================================
diff -u -r72408e2d8ef5bb38ad16ee9c6ec9c3b8607fe54e -r0b9b646093b40e3e6b17a242e64bc3e8f34f6897
--- Core/Common/src/Core.Common.Gui/Forms/MainWindow/MainWindow.xaml.cs	(.../MainWindow.xaml.cs)	(revision 72408e2d8ef5bb38ad16ee9c6ec9c3b8607fe54e)
+++ Core/Common/src/Core.Common.Gui/Forms/MainWindow/MainWindow.xaml.cs	(.../MainWindow.xaml.cs)	(revision 0b9b646093b40e3e6b17a242e64bc3e8f34f6897)
@@ -277,22 +277,6 @@
 
             Close();
 
-            if (Ribbon != null)
-            {
-                foreach (RibbonTabItem tab in Ribbon.Tabs)
-                {
-                    foreach (RibbonGroupBox group in tab.Groups)
-                    {
-                        group.Items.Clear();
-                    }
-
-                    tab.Groups.Clear();
-                }
-
-                Ribbon.Tabs.Clear();
-                Ribbon = null;
-            }
-
             ribbonCommandHandlers = null;
 
             SetGui(null);