Well, from this thread I got the AIR and I can confirm it wants beta 4, which timed out months ago. An official release for anything after beta 4 was never made, but I went ahead and repackaged it so it will run with the latest AIR version.
You can download it
here. I will tell you now, it is self signed.
All I did was repack and make the necessary changes to do so. The editor itself is the AIR release version.
Enjoy.