Those of you who manually installed the snap for PlexHTPC may be wondering how to change to the automatic updating which snaps bring now that the app has been released. This command appears to accomplish just that:
snap refresh plex-htpc --amend --channel=latest/stable
The --amend is needed because the app wasn’t previously on the store but is now. And the channel sets which release channel you wish to be on.
I’m not absolutely certain that this is the correct command to use in this case but it did appear to work for me.