Thanks for the file!
I tried a bunch of things with it but couldn't reproduce a crash so far, so if you do see it again and can work out any other details that might be important, let us know and we'll try them out.
It might also be worth checking if a mini-dump was crashed at the same time as the crash. If the crash dialog appeared there's a good chance a dump was created, but they aren't always (depending on the nature of the crash). If you have one please PM it to me and I'll see if it points to anything potentially useful in tracking things down.