I spent the past couple of days writing a java program for making animated start buttons. The program allows you to import a gif, make a static icon from 3 PNGs, or make a spinning icon from 2 PNGs.
There will possibly be future updates to this, but for now this is what I have.
Download available here: https://gitlab.com/DarkEnchanter/Classi ... ationMaker
Direct link: https://gitlab.com/DarkEnchanter/ClassicShellAnimationMaker/uploads/139515d5afb69f306f9828d304efbfda/classicshelliconmaker.jar
Some screenshots:
