Update Plex on CasaOS?

[JG5657]

Hi. I am sure that this has been asked before, but I couldn't find a clear solution! I have recently bought a Zimaboard and installed the Plex app that comes with CasaOS. I updated CasaOS to the latest version today. Plex informs me that there is an update available. How do I go about updating Plex? Or do I have to wait for CasaOS to be updated again? Thanks for your help!