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.
#1506 Add Flex SDK?
How does one install the Flex SDK into the decompiler, I'm so confused on getting it set up.
You just download it (use google) - it is a zip archive or something like that. Unpack it somewhere on your hard drive, then set Path to the directory in FFDec advanced settings / Paths tab.
See I thought it was the zip file itself I had to have JPEXS find. Thank you for letting me know! While we're here, will this fix some of the errors when compiling in AS3? Some more complicated AS3 decompile and recompiling doesn't work out well(I use the newly compiled's AS P-Code and replace the original with the edits but sometimes I can't because the recompile is can't compile correctly sometimes)
Setting up Flex SDK and enabling it in advanced settings makes compiler use Flex which may be more reliable (But I don't really know since I did not test it much).