For latest patch notes visit the Discussion forums.
Version 3 is available on a public beta branch with the new controls, UI and mechanics. Still making alot of tweaks. Save files made in the beta version will not be supported at release in a few more weeks. But you can test out alot of the new features if you like!
Controls are available at: http://www.mr-worlds.com/
And I snuck in Hold Left Grip(Shift) when choosing an object to add it to your favorites. Shift click it again to remove it.
-Levi