Air 4 or 13beta for the AppStore?

[Gabriele Campi [Media Logic]]

Hi, I must update one of my IOS Apps on the App Store built with Flex 
4.11 Air 4 beta, and I wanna try Flex 4.12 but I don't know which 
version of Air I have to choose.
Last time I used the Air 4 beta but now it disappeared from the Apache 
Flex SDK Installer.

Thanks
Gabriele