Cannot uninstall PLEX from my WD NAS

When I click the uninstall button on dashboard to remove Plex, the NAS shows it is Updating, but the darn Plex app is not uninstalled; it remains on NAS and still works. I want to remove Plex because there are dup music albums in database, so once Plex is removed along with its data, I can reinstall again without the dups.

Anyone have any ideas?

AOLVED, Solution here for anyone interested.