how do I import it to Gamemaker - as with the newer version Tools -> Import Local Package doesnt allow me to select a .yyp file.
I just realized you were talking about yyp file and not yyz.
I’m not sure how to open yyp files. I think you can just double click it? But if you have a yyp file of this asset, you probably bought it from GameMaker Marketplace. If you buy things from there, you can easily add them to your project using the Marketplace library.
I know you were able to add the files to your project, but I’m just saying this for future reference.