Yes, excellent info response, thank you.
Unfortunately, nothing really jumps out at me.
The error window definitely is not a Hexagon-style error window, although it’s still possible that it’s a widgets error which was used to either create Hexagon or parts of it.
I’m unfamiliar with the “feel” of Windows 7, so I’d like to know if the error window looks like the type of Windows 7 error box that you would get for some mundane error like “path not found” or “cannot delete <file>” or some such?
And just a shot in the dark here based on something I read earlier: Where did you get the OBJ file(s) you’re working on AND/OR do you by any chance use a program called Wings3D, and did you use it to UV map your model?
And of course, if anyone else wants to jump in here with a clue or an idea, please feel free because I think I’m on thin ice here.