Hi
I formatted & Installed Rhino 6 on the new PC during the validation process got the message
validation failed because: the license key I entered is used by another computer
(I get the same message every time I open Rhino).
It can’t be… that’s why you need to contact sales as Rodrigo posted above.
(I think maybe if if you wait 10-14 days, it will automatically reset, but I guess you don’t want to wait that long…)