I too am getting the external exception error. Just recieved my BIAB-2010 Ultrapak on external USB, and when I exit the program, I get this error.
Same OS - Windows 7 64bit - all up-to-date. I installed update 265 to the x:\bb folder on the drive (in my case, m:)

External Exception Error C000001D at: 056f3861 - over and over. I eventually can't click on the message, and have to kill bbw.exe using task manager.

Tried compatability modes, and XP SP2 mode fixes it for me, but now I have a UAC popup each time I go to launch, annoying, but will work for now...help?
Is there anything special I need to do to force this to run under 32-bit mode? All windows applications under 64bit windows <should> go under c:\Program Files(x86) to tell the OS that the application is 32bit....could that be related?

Thanks,
Jacques