Yeah, use the version from the course (3.2) or 3.3 LTS. Especially if you plan to make Assets to be included in the library. Models made in 3.4+ will not be accepted, because they won’t be usable; 3.4 is not backwards compatible.
But if you want to know: Specular has been renamed to IOR Level and is found under Specular. Roughness is still Roughness (just below Metallic).
