I want to use my gadget II on a different computer

I want to use my gadget II on a different computer and I can't figure out how to do it. I am using Windows II. I have loaded the EOS family v3 (3.2.0.291)

on my computer, but is there someplace to input the license number? My key is old enough that it is corrupted, but I have to the license number recorded on the old computer. 

Thanks for any insight, I would really prefer not to have to buy a new one. 

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