Possibly, have you tried moving a copy of the project to 4.9 to see if this particular crash has previously been addressed? Additionally, if you remove your content folders from the content browser, do you see the same crashes?
Possibly, have you tried moving a copy of the project to 4.9 to see if this particular crash has previously been addressed? Additionally, if you remove your content folders from the content browser, do you see the same crashes?