NIS 2014 install question....

I have a license good for 1 year and 3 computers. I have installed NIS on 2 computers. But, on one of them. The pc died and I have ordered a new pc. My account says 1 install remaining for another pc. How do I get it back to 2 since my other pc is dead with NIS installed on it? It will never be used again. Or am I screwed and only have 1 install left?