[Pibe38]

Yes, Marsware's developer has been missing 2+ years, it has been posted a couple of times. Some people have received their code with success, others have not received it at all, others receive it after months. I'd make sure to contact PayPal if you haven't received it in a while since after a certain time you will not be able to ask for your money back.

As far as SkTools, I believe it needs the Owner name in order for the reg code to be generated, so make sure the Owner name on the device and the one given when purchased match. I had no issues adding my code to the Demo version to unlock all the features.