Flash Builder / AIR: Can't export release build for AIR 2.0

I have an ActionScript only Flash Builder 4 project of whic开发者_StackOverflowh i know that it was successfully exported for AIR 2.0

If I set the the Flex SDK to 'Hero' and the required AIR version to 2.6 in the app-descriptor like here, then the export works fine:

However - if I change the Flex SDK to 4.0 (overlayed with the AIR 2.0.2 SDK) and change the version in the app-descriptor.xml to 2.0 like here:

then it will compile just fine and run in ADL, but it won't export. If i click the "Finish" button, the window only flashes for a moment but nothing happens. i can repeatedly click on finish, just a short flash, no error message, no exported air file.

If I leave the Flex SDK on 'Hero' and the only thing I do is to change 2.6 in the app-descriptor.xml to 2.0, then the same problem occurs!

I tried this with Flash Builder 4 as well as Flash Builder Burrito - in both cases the same problem. Anyone an idea what goes wrong?

The app descriptor file is very different between 2.0 and 2.5 and above. I'm surprised you're not seeing an error because I did (maybe try doing a clean?). For instance, 2.5 supports profiles, instead of the <version> tag, it uses <versionNumber> and it also supports metadata for android/playbook OS'.

Try deleting the application manifest XML for your air app and allowing flex builder to re-generate it. Sometimes these kinds of glitches happen because of errors with the application manifest.