An aseprite-file importer for unity written in C#, built upon the experimental AssetImporter API
OpenUPM lets you install packages more easily by providing a downloadable unity package which will setup the package automatically. You can find the download on the following link:
# Go to your Unity project directory cd YOUR_UNITY_PROJECT_DIR
Install package: io.tinu.asepriteimporter
openupm add io.tinu.asepriteimporter
Window > Package Manager).
Add package from git URL...
https://github.com/martinhodler/unity-aseprite-importer.git) and press Enter
See LICENSE file.
Note: As of Unity doesn't include any editor scripts in the game, you don't have to license your game under GPL.