Try the following testing the game after each step:
Clear your cache, go to documents\1c softclub\cache, select everything under that folder and delete it. This forces the sim to rebuild the shader cache and will prevent problems with graphic glitches and/or FPS that may be caused by running a newer version with cached shaders of a previous version.
Restore Game files to latest Official version
If all else fails re install after backing up important .ini files.
1.
Backup control & ini files
2.
Uninstall and then reinstall
Hope this helps.