Hi Allan:
Two things,
First, please send me that file, Ill fix it so it cant happen again. Second, if Mach ever drops out on you like that, immediatly run the drivertest.exe program. Let it run till complete, this will then allow you to shut down windows, though you wont have to anymore. The drivertest stops the driver and gracefully exits when something like that happens. Sorry for the bug, but if you send me the file, Ill make sure no-one else sees it..
Thanks
Art