License Question

I just purchased two Rhino 5 License Keys and received them on Jan 6th. Neither have been used or installed as of yet. I see Rhino 6 is now available. which versions should I download, 5 or 6?

Neither. If you haven’t installed Rhino 5, contact your reseller and have them exchange the V5 licenses for V6. The Rhino 5 licenses you bought are not valid for V6 (and they are easily exchangable by the reseller).