Your Plex Cloud will automatically update, so please check the version in the Settings screen before reporting issues that the a subsequent update fixes. Naturally, your next question would be 'How and when does my Plex Cloud update?' This happens when you aren't using your server (it would be really frustrating if we did it when you were looking at your holiday snaps!).
Support site: Plex Cloud
Plex Media Server team lead & developer in the 'Plex Cloud' team