One question, in which versions of Aseprite does this script work?
I've 1.2.25 dev and the extension doesn't work for me
Ah shoot, my apologies, it looks like I might be using functionality that was added to the api in v1.2.31. Though if your able to upgrade to 1.2.39 this is the newest stable release at this point. Lots of bug fixes and stuff in there!
