Delete Plex.app from your Applications folder and delete the following: /Users/[YOUR USER]/Library/Application Support/Plex Media Server /Users/[YOUR USER]/Library/Application Support/Plex /Users/[YOUR USER]/Library/Preferences/com.plexsquared.Plex.plist /Users/[YOUR USER]/Library/Logs/Plex.log /Users/[YOUR USER]/Library/Logs/Plex Media Server.old.log /Users/[YOUR USER]/Library/Logs/Plex Media Server.log /Users/[YOUR USER]/Library/Logs/Plex Media Scanner.old.log /Users/[YOUR USER]/Library/Logs/Plex Media Scanner.log /Users/[YOUR USER]/Library/Caches/com.plexsquared.Plex /Users/[YOUR USER]/Library/Preferences/com.plexapp.plexmediaserver.plist