Whenever I start a Smart Clean from CleanMyMac 3, Total Finder becomes broken and will not run after reboot.
After some hours of trial and error, I pinned the problem down: CleanMyMac optionally deletes unused localisation files from all apps.
Weirdly enough, if either French or Portuguese is removed from Total Finder, it fails to start. Removing all other localisation files has no effect on the app (CleanMyMac won’t let you delete the current system language locale)