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.
#1725 Replace multiple images/sprites at once
You can highlight images and export them together in one action, but you don't seem to be able to import replacements back in with as much ease. If you try to highlight multiple items and replace them, it only gives you the option to replace with one file, not multiple, even if the file names are the same as their exported counterparts. It would be better if you could replace multiple images in one action if you just selected multiple images to replace with.