Howard
For clarifty, I'm pasting this section from the Licenses FAQ linked above:
How many machines can I use my activation key on?
Each activation key can be activated twice, for example once on a desktop workstation and another on a laptop. If the license key is activated a third time, then all previous activations of the software will be cleared, and you will need to activate any copy again.
I’ve upgraded my machine - How do I transfer my license from my old machine?
Just enter your activation key again on the new machine after installing DaVinci Resolve Studio. If you have reached your number of activations, all previous activations of the software will be cleared automatically. Alternatively you can choose the Deactivate option from the “Help” menu in DaVinci Resolve.
Regards
Shrinivas