That's the hilarious part about this. You probably won't need CS5.5, or any adobe product other than alchemy. You will compile straight from unity or udk or whoever else they drag onto their sinking ship. As a guy that writes a lot of actionscript, I can tell you that adobe stopped selling the best tools for making swfs long, long ago. Jobs was right about that one, adobe needs to return to making tools and selling them (although I still have some hope that he was wrong about the runtime ). The greedy imbecile at Adobe that looked at udk's licensing terms and thought they could pull similar royalties off of a cross compiler should be tarred, feathered, and booted out of the organization.