FCPX 10.4 on Sierra 10.12.6 beachball

I updated my FCPX without thinking it through.

I had to update a few libraries for quick projects.

I am done with the edits but it was difficult.

I had to reinstall plugins for the first project and the playback would stutter and beachball some of the time.

The second project was a nightmare. I could never playback the project. I made proxies and I optimized my footage. I had to use the frame by frame tap to get through the edits.

I need help fixing this issue very soon.

I haven't had to trouble shoot my edit system since 2007 on OS9.

I am on a iMac (Retina 5K, 27inch, Late 2014) 4Ghz intel Core i7, 8Gb memory 1600 MHz DDR3, AMD Radeon R9 M295X 4096 MB

FCPX 10.4

I tried resetting the software preferences. It helped but it did not get rid of my playback and the beachball.

I tried another user login.

I have not reinstalled or done a clean install because I don't know how to do it. I will google it if it comes to that.

I even downloaded ETRECHECK but I had not idea what I was looking at.

Do I run it to check beach balling or apps crashing?

Any help is appreciated.