Update:
I’m back in the eMMC installation with my previous kodi. I don’t know what did it but I deleted as much plex stuff as I could as well as the Textures13.db file.
That’s my whole Sunday gone working this out, enough to make a grown man cry. Kudos to @Sholander for giving their day up to help me too.
Glad you succeeded and learned something in the process
Hope that the most important thing you learned is to make backups of a working Kodi installation.
If you had a backup from before installing Plex it would take you 30min to make a fresh eMMC installation and restore your backup to get you where you were before the problem…, or a least it would save you a Sunday afternoon for more pleasurable pastime.
Yeah actually I had a backup but as it all went down just didn’t have the knowledge.
I am thinking to put this fresh install on the eMMC and start all from scratch anyway so reading up on what method I need for that.