My Buzz TV box and other android boxes don’t work

My android TV boxes Google play did an update in Plex got updated and now are android mobile and come up as a tablet but they’re on a TV. The older version asked you if you wanted to be in TV or in mobile now they’re in mobile and they do not work properly how do I revert back to the old Platform or version because these are not a phone and don’t have a mouse to navigate is very difficult now

If your device allows side-loading, you can use the last release of the legacy app from here (10.26; the 10.27 releases are Amazon-only).