Using an ActionScript only project for AIR dev in FlexBuilder 3. I've already gone through the setup of changing the .mxml to .as to generate the main working file. I've also used NativeWindow.stage to get access for addChild, etc. Is there something I'm missing? When I try to use any flex codebase, there are always 'VerifyErrors'. Also, with ApplicationUpdaterUI there are also 'VerifyErrors'. Cannot find "mx.core.ByteArrayAsset". If I use the same code, but with MXML as the base everything compiles fine. Any ideas?