I just pushed a new version of Starling Builder 2.0.
It's based off Starling 2.0 and Feathers UI 3.0 beta.
You can download the binary at
If you need to access the source code check out the 2.0 branch here
You need to add the latest Starling and Feathers source to be able to compile.
There may be issues, and it may be caused by either Starling Builder, Starling or Feathers UI bugs. Feel free to report any issues you have and I will coordinate to the right people for the fix:)
The previous Starling 1.x version will continue to maintain for a long time since some of our games are not very likely to upgrade to 2.x.