If you are looking for this file because you've or are having trouble migrating your license to a newer version, I can help you find the developer's support contact or documentation.

: E-Cycles usually comes as a standalone Blender build (a .zip or .7z folder). You do not "install" it as an addon; you run the blender.exe found inside that folder.

: Another official platform used by the developer (Mathieu Menuet). Check your Library if you bought it here. ⚠️ Important Safety & Compatibility Notes