Typically I see crashing leads back to the hardware your machine is running or where the CAD files are being stored when you are opening/editing/saving them. What are the...
- Make/Model of your computer? (i.e. Dell Precision T3610)
- Make/Model of your GPU? (i.e. NVidia Quadro K2000)
- Version/Edition of your OS? (i.e. Windows 7 Professional)
Also, do you store your CAD files on the local drive or on a network drive, external drive, flash drive, or local drive being managed by a cloud storage program (like Dropbox)?