Just got Canyon working today after purchasing it on steam (thanks Alinoa

There are dozens upon dozens of tutorials out there and a lot of them have conflicting information, and I'm not even certain they apply to the Steam version of Canyon because I've already noticed the steam version has slightly different filepaths.
I'm working with Paint.Net to create the image and save as sticker.tga and icon.dds, but no matter where I place them they don't show up in the editor.
Anyone with the Steam version had any success?
Thanks.