Hello,
I noticed that SolidWorks crush for easiest using. I will cite two examples which SolidWorks 2014 crush with me.
I make tube using weldment, when I change the unit of load in simulation, SolidWorks will crush.
The same case happened when I tried to open old CAD version of SolidWorks 2009.
when I tried to edit definition shell in solidworks simulation SolidWorks will crush.
Run the SolidWorks Rx > Diagnostics tool to see what it reports.
What are your system specs?
Did you perform a clean uninstall when upgrading to SW14?
https://forum.solidworks.com/docs/DOC-1014
Have you tried running a repair of SW?