If your Plex server is running directly on your QNAP NAS device, there is no Windows and there is no Registry.
Boomark this: Qnap faq.....read me first!
Go to Q32
But you seem to have 2 Plex servers. One on the QNAP, and another one on a NUC mini computer, running Windows.
Which one do you want to re-claim?
If you want to reclaim the one on the NUC, then indeed you need to access its registry.
