I still can't Dr. Carter. I've already installed ArcMap 10.6.1 using my EVA code. But know I've downloaded and installed ArcGIS Pro, and in the Sign in window, I go to "Configure your license option" then in "License Type" hit "Single Use License" and then again as I did with ArcMap I try to "authorize it with Esri using the internet" and then with my EVA. And I get a message saying that all requested features have already been authorized on this machine, and after I finish this process, I get an ArcGIS Pro message saying that Im not authorized for ArcGIS Pro Advance single use; and that I have to use another core level or authorize another single use license.
Hope you, or someone can help me. Than you!