NIS reinstall after Windows reinstall

I know there are a few other threads on this but:

I have NIS for 3 computers, all licenses are being used. I reinstalled Windows on one of them, and want to reinstall NIS.
On mynortonaccount it shows all three devices, with an indication '3 of 3 seats used'. It won't let me download another one without a new Key.
How do I reinstall on this computer that Norton shows as already being used? Do I use Remove License on that particular device to open up another license, then reinstall back onto the same machine?

Thank you