Theme Bundle File Structure
Your theme bundle should be a zipped .bundle format. This is a MacOS specific file type but you can do the same by making a ThemeName.bundle folder on your Windows/Linux PC and Zipping that. Inside this bundle should be your themed icons. The icon must be named exactly the same as the application's name. If there is a space in the application name, make sure to change the name of the file to have spaces. Your icons should be in 1024x1024 resolution for best results. Themes with icons below 512x512 resolution will be deleted due to poor quality.
Your theme bundle should follow this format: