I've only done some speed reading on the development of this thread. And I used one eye.
So, please do not take this as a thorough analysis of your specific challenges and me providing the magical solution here.
It looks like the efforts of other experienced members to help you, and the steps they provided you with that might solve the issue are problematic to accomplish.
That's quite understandable, this all is far from an obvious and easy matter.
To explain a bit about my personal viewpoint:
I don't care about play counts, I don't care much about anything that is not stored within my music files themselves.
So I make sure my music files and folders are backed up well. If Satan takes control of my MusicBee I'll send him back to the oven and start with a brand new MusicBee installation without crying much.
So, why not just create a new MusicBee library, and have it scan the folders where all your music files are residing?
Any tags they contain and you have carefully edited over the year(s) will be there.
Am I missing much here?