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?

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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'.

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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.