:bounce: :banghead: 
It crashed my system about 15 times during my 3 hours of working on it. Usually crash when
- Press undo (Cmd+Z) many times
- Select more than layers at once (by holding ‘Shift’)
- Export to X3D file
Then i experienced one more problem, sometimes the mouse hung, and i can’t get used of it, unless i press Cmd+Tab (Keyboard is still usable). Then i have to quit Modo and restart the app again, one lucky thing is that, i’m still able to save my document (Cmd+S). That’s still better than crashing.
:hmm: