Installing Licence on New laptop

I Installed DO 13 on the new machine - then copied across the licence file from my original - seemed to work but now says unregistered? - Licence detail seems to suggest one install and a 2nd on your laptop - How do I make that work please?

You need to use the Licence Manager to install the certificate.

Thanks - the licence manager said my cert was an old one - so used you licence manager to download a fresh copy - installed that new one - looks ok so far - Thanks'