Sorry for the delay in responding. Unfortunately I'm unable to duplicate your issue with the provided .tgd. Alt+RMB is not "rotate", it's translate/"pan" in most configurations. I tried all the mouse configuration options but had no crashes. All layers were enabled. There was no object to load and several textures were missing as well. Could you possibly provide a more simplified .tgd file to exemplify this particular issue?
Thanks!
- Oshyan