Everything works in Cycles. In EEVEE everything works except the Edgewear mask maker, which uses the Bevel node (Cycles only).

No. Masks use Generated coordinates by default, so they work on any mesh without UVs.

All settings are available in node group in shader editor.

There is a short description in the documentation how to use it, but if you have never did anything with shader editor I recommend watching a short tutorial on you tube. I assure you that it is super easy to learn how to use it.