No software should ever crash, however, you design has 13 errors and 13 warnings in the timeline.
I would start over from scratch and use appropriate modeling techniques. In a mechanical design, scale and body-move should only be used in very rare cases.
When going back in the timeline and making changes, use Modify->Compute-All, to recompute the timeline and make sure the change did not break anything.
If the change does return a red, or yellow icon, determine the root cause and fix it. Do not proceed until that is done!
