Hi Chris thanks for quick reply; the only way I can regain control of the program is by the use of the Task Manager and closing the program. I know it's the bain of every tech support persons life when they get a problem presented to them which is does not occur predictably. Next time the problem occurs I will attempt to take a screen shot. Please note It is only in the Beta that this happens, the full release program has never exhibited such behaviour. Perhaps it may be wise to leave the resolution of the problem until I can reproduce it on a regular basis and then repost.
Best wishes, John