Endless crash loop - please help!

I am in the middle of an edit and tried to use Magic Bullet Looks on a sequence, whereupon FCPX crashed with the message "Final Cut Pro quit unexpectedly while using the Looks3 plug-in"

I've used Clean My Mac to uninstall all of Magic Bullet, looked for every hidden file to do with Magic Bullet Looks and trashed them, also trashed FCPX prefs but it still comes up with the message.

How do I exit this loop?

Clean My Mac is dangerous. I have 5 clients/students who's systems got totally trashed by it. Delete FCPX prefs by holding Opt+Cmd when launching FCPX. Uninstall pro apps with the free "FCS Remover" from Digital R billion (dot com). Magic Bulletin, I think, has an uninstalled if you contact the developer. Which is my primary suggestion, contact the plugin developer directly to fix it.

Also make sure you have the latest update to MBL3 which is currently 3.1.4. You can check and update thru the Red Giant Link application.