Sometimes, for no apparent reason, it would appear that MW was not even open or that the tray icon disappeared. Clicking on the MW icon on the desktop or the start menu would produce a popup dialog box telling me that MW was already loaded. However, I still cannot get MW back on top to work with. The usual method of recovery is to pull up the Task Manager and kill MW, and then restart the program.
Instead of showing the useless dialog box, MW should simply bring the program back to the top without showing any error messages.