Plex is now free to use on PlayStation 3, PlayStation 4, Xbox 360, and Xbox One. When it launched in January, a Plex Pass subscription was required, but that's no longer the case after a recent update. If you don't know about Plex, it organizes your media collection and lets you play it on virtually any screen.
Other changes -- for PlayStation owners only -- include navigation improvements and some changes to button mapping, among other things.
Head here for the full PlayStation notes, and of course download or update the app via your console.