The key is for one-time use on a single device.
You can email us at:
info@gayeti.com
We'll send you a new key! :D
Man, it's really tiring. We've submitted for the 4th time now, and Steam's feedback keeps coming in bits and pieces – like 'need save files', 'enable this', 'disable that'. Each round takes 7-10 days (it's supposed to be max 7 working days, but it feels like they always wait until the very last day!). Anyway, we think it's probably almost sorted out now. Thanks for sticking with us! :D