Instanced Static Mesh Apex Crash

When I run my project through visual studio using the debugger, the game runs fine and theres no errors, but when i run the editor by itself it crashes when i remove an instance from an instanced static mesh component. i think the error has to do with physx since this is what pops up when i debug the crash

http://puu.sh/izK8s/b5055920aa.png

but im not really sure :frowning:

[DxDiag.txt][2]

heres the crash report datalink text

heres the log file log