Mike Dragon

Hey, little question to all of you who play Gmod: Do you know the addon Animation Editor or whatever happened to it? I used to have but I can't find it anywhere, now. It's no longer in my game, I don't recall uninstalling it and I can't find it on the Workshop. Didn't find information about it on Google, either. Only tutorials on how to use it, which obviously are not what I am looking for at the moment and in fact, are completely useless if I don't have the tool. :\ I kinda need/want that thing, now that I decided to explore PAC's functions a little further.