TOS reverted from 5.1 back to 4.2, can't reinstall Plex Server now

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Upgraded my TNAS to TOS 5.1, then reinstalled plex media server. That was all hot garbage, so I did a factory reset back to TOS 4.2.40. Life is grand again, but Plex media server won’t install properly now.

I used the reset to factory default → custom → selected the tos 4.2.40 installer package from the terramaster website. I did not go through the “first time initialization”

I’ve uninstalled/reinstalled it. Tried the steps listed on Plex fails to start? - TerraMaster Official Forum

It seems TOS 5 migrated the plex media server to a new location as there is a migration.log file stating it moved the folder, so when I reinstall on the old OS, it seems confused.
No shortcut is created, it shows it is installed. If you click start, it stops immediately. I assume because the files don’t exist in the correct location.

In the User directory, it creates a plex and tmp_transcoding folder, but if you open the plex folder, you just see another plex and tmp_transcoding folder like its just a referential link back to itself. It goes on and on if you keep opening the plex folder.

All the plex files are now in a shared folder called plex, but I know this version looks to the user directory.

I tried copying the files to the user folder, but TOS won’t copy directories that big. I don’t know how to do it with SSH.
I tried deleting the plex user with the deluser command but that had no effect on reinstalling.

I guess I’d be looking for a way to just do a clean removal of plex media server…

This is the plexmigration.log:
INFO: PMS AppData migration – START
INFO: PMS AppData migration – Found TOS 4 PMS Appdata directory (‘/home/plex/Library’)
INFO: PMS AppData migration – moving ‘/home/plex/Library’ → ‘/Volume1/Plex/Library’
INFO: PMS AppData migration – removing TOS 4 tmp_transcoding direcory (‘/home/plex/tmp_transcoding’)’
INFO: PMS AppData migration – END

Follow up on my own post. I couldn’t get it to work, reupdated TOS back to 5.1 and am operating plex off of that. Not great. The performance is a lot worse disk and network wise; but its still able to stream my content so far.

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