For version 0.1.0, just append the AAA Material from inside AAA_Material_X_X_X.blend via File/Append. For version 0.2.0 and above, read the instructions inside the package or watch the video tutorials.

Since it is designed for Cycles, AAA Material will benefit from a solid GPU. 4090 (and above) is recommended.

Pro - for one (1) user who wants the material as well as the image textures (fingerprints, rust, stains, etc.) and all the future assets
Pro Studio - for up to five (2-5) users who want the material as well as the image textures (fingerprints, rust, stains, etc.) and all the future assets
Basic - for one (1) user who only wants the material and doesn't care about the image textures (fingerprints, rust, stains, etc.) that can be seen in the promo video(s), or any future assets

It will work with Eevee but we strongly recommend that you only use it with Cycles because of the speed and the fact that you will get better results that way, especially if you plan to bake different render passes. Of course, a solid GPU (4090 at least) is a must. AAA Material is a very complex node setup and sometimes Eevee struggles with it more than it is acceptable for any user.