Hello
I looked up on your matter regarding the bugs in the extension,
Make sure u save ur file before using this extension, that will fix the issues of error parsing json, and random selection will automatically work when u press next brush key (which can be set through edit>preferences) on ur keyboard ,
UI is buggy may be because of the version u using the aseprite , and make sure u make the proper selection grid.
If you still having any issues you can contact me on discord.
Regards
Kiri
