Please use the hosted app on https://app.plex.tv/desktop or update to the version of PMS that was released to beta today ( 1.22.2.4282) which has the updated web app
Plex Media Server - #419 by emilybersin and after selecting “HD Only” channels, refresh the browser using F5 and it should be correct (as mentioned here Missing guide data - #73 by sa2000)
If there is still an issue with 6.1 please let me know
