Unlocking the Plex server is slightly different, and it depends on the operating system. If you use Windows, you need to use the Registry Editor to get the job done. First, open the Windows Registry and navigate to this path: HKEY_CURRENT_USERSoftwarePlex, Inc.Plex Media Server. Then find these REG_SZ values: PlexOnlineHome, PlexOnlineMail, PlexOnlineToken, and PlexOnlineUsername. You need to delete all of them.