On the surface these crashes point towards a hardware fault or issue more than a problem with the simulator or addon. If you have an overclock on the CPU or memory then may need to be reduced, and some hardware diagnostics ran (memtest, etc.). But first let's clean up the simulator to reduce the software risk:
Remove all third party plugins except Gizmo64 (AviTab, xjet, etc.)
SkunkCraftsUpdater should be removed permanently as it is deprecated by the author