I had the same problem. It stopped when I disabled the (default) StickyNotes add-on. When I have Stickynotes enabled, the debugger marks this:
quote:
function OnEvent_Uninitialize(MessengerExit){
if(MsgPlus.Version > 4.10){
Interop.Call('User32.dll','EnableWindow',ListenerWnd.Handle, false);
ListenerWnd.Close(0);
Registry.Hidden = bHidden;
Registry.Save();
Stickynotes.Save();
Stickynotes.CloseAll();
UnRegisterHotkeys();
}
}