Hi Jamie,
Are you on 6.35? Rhino - Download - Rhino 6 for Windows
Lets clear your old licenses out by deleting the contents of this folder.
%AppData%\McNeel\Rhinoceros\6.0\License Manager\Licenses
HI Japhy,
Yes I’m on 6.35.
Okay, I’ve cleared them, shall I try it again?
Yes, Also make sure you have access to https://api.mcneel.com/ , there could be a firewall blocking.
It worked, thanks Japhy.