Install tortoise svn (TortoiseSVN 1.7.13, Build 24257), and try clean up (mendix app folder, right click) with :
-clean up working copy status
-delete unversioned files and folders
-delete ignored files and folders
- include externals
Is there a Crash report dialog shown right after the crash?
If so, could you paste the error details into this post and also send the report?
You could try to download your project again from the teamserver into a different directory. But that does solve the problem of uncommitted changes so you then will loose the changes you did not commit.
Regards,
Ronald