My Logic Pro X KEEPS SPINNING THE BEACH BALL How do I get IT working normally.?

Since your issue seems Flextime-related, I would try bouncing/exporting the flexed tracks, then either disable flex or import the tracks into a new session.

Sometimes the error occurs because of a cpu overload. What sample rate are you using. Increase you audio buffer rate.

Also check your plugins if they are all up-to-date.

Which Logic, MacOS and computer version/model are you working on?

BTW a re-installation of Logic is mostly not required. I’ve never re-installed Logic due to an issue.

Would it be a good idea to restore from a past back up , and if so, what? or should I just continue to use the new profile?

I can't give you a proper answer except I would try the most promising.

It's not clear what you mean by Profile. There is the term Profile in MacOS, but I've never changed my profile. Or do you mean "User Accounts"?

However, you have at least 4 different options:

1. Find and delete more logic preferences (there might be more than just com.apple.logic10.plist).
2. Create a new User Account and copy the logic preferences (there might be more than just com.apple.logic10.plist).
3. Create a new User Account, do the adjustements and continue there.
4. Retrieve from a backup.