Fix #1033 again

QuickLook/ViewerWindow.xaml.cs

@@ -104,7 +104,7 @@ namespace QuickLook
 
             if (SettingHelper.Get("UseTransparency", true)
                 && SystemParameters.IsGlassEnabled
-                && App.IsWin10
+                && (App.IsWin10 || App.IsWin11)
                 && !App.IsGPUInBlacklist
             )
                 WindowHelper.EnableBlur(this);
@@ -152,4 +152,4 @@ namespace QuickLook
             hide.Begin();
         }
     }
-}
+}