I notice you run Windows Vista. My mum has been playing with TG2 and this is happening on her Vista pc aswell. Any movement or tab change, shutdown.
Funny thing is, it worked fine to begin with, when I was showing her the ropes.
Firstly, it started this error with just camera movements in the 3D preview, now it's every move you try to make through tabs etc. It's the same runtime error.
I've never had TG do this on XP.
Sorry I can't give any details about her Vista XP spec's, I don't know what they are, only that it's a beast of a gaming computer with quad cores and lots of memory. That isn't the issue.