Re:AnimateArchive (old versions of Adobe Flash)
by duskwuff on Sunday November 19, 2023 @02:36PM
(#38336888)
flasm and flare [1] may also be of interest to you.
[1]: http://www.nowrap.de/flasm.html / http://www.nowrap.de/flare.html
Then I found JPEXS Decompiler[0] that allows for full modification of SWF files!
[0]https://github.com/jindrapetrik/jpexs-decompiler