1 - I created a new Plex Docker called "Plex2" then stopped that docker right after creation
2 - Aimed the original "Plex" docker to that appdata folder fired it up and a new "Plex2" appdata location.
3 - Fired up "Plex" docked and it ran correctly as if it was a brand new install.
4 - closed the "Plex" Docker then aimed my original "Plex" appdata folder back to the ordinal "Plex" appdata and it fired up and started working.
5 - Deleted the Plex2 docker.
this also happened with Readarr and I was able to get it working the same way.