Error Loading XNurbs in Rhino 7

Hey guys, I’m new here. So i Purchased Rhino7 and XNurbs but i get a message saying Error Loading - XNurbsRhino7.rhp, I followed every step of their manual, downloaded the plug-in directly from their website, and still not able to make it work. I haven’t even been to the point where I input my license key. What could i be doing wrong? Thanks