I am connected to 3 plex servers but via the ap on my Samsung UN65U8000 its only locked to one and I can’t switch between them even using the colored buttons. Please help.
Press the Yellow button and it should show you all the servers connected to your account.
Wait for the icon to turn green(local) or blue(remote) then select it and press enter.
Don't try to connect when the icon is still showing a question mark, it will not work until the connection is made.
May I advise you to also download the manual from the link below to get you started.