If you are looking for the decompiler itself, visit https://github.com/jindrapetrik/jpexs-decompiler
List of issues
: The issue tracker is now writable again and logged users can download files too. But note that our support is very LIMITED.
#1425 Support Opening FLA files.
Currently, JPEXS Free Flash Decompiler is able to decompile SWF files back into an approximation of their source FLA files. I think being able to do this operation in reverse would be useful. IE: Compiling FLAs into SWFs. This would make it easier to check for inconsistencies, as users could decompile the SWF into an FLA, then recompile it back to an SWF and see how closely the two SWF files match.