Thanks for this… My install is in a Docker, so I had to modify your steps a bit. What I did was share(on unraid)/mount(in windows) my appdata directory where Plex docker container lives, then in windows navigated to the db location. My Docker install in unRAID db locations was (z is appdata)
“Z:\plex\Library\Application Support\Plex Media Server\Plug-in Support\Databases”
From there I manually created the sql command pointing to where I extracted it (moved it to c: root for easier access) running the following command after backing up the db.
"c:\sqlite\sqlite3.exe com.plexapp.plugins.library.db “DELETE FROM media_provider_resources”
Also, I deleted the tv.plex.providers.epg files before restarting plex. After restart, I was able to readd the tuner.
Great work!