Serial number for upgrade

Hello I have the old sw dvd x platinum and video vault. I purchased this sw about 3 to 4 years ago. I would like to upgrade to dvdnextcopy ultimate. I have lost my serial number. Can someone tell me where I can find it in the sw or registry. I would really like to get the 50% off. I have have been dealing with tech support for 3 days and they are totally lost.

Thanks:sad:

I have no way of remembering how to locate the serial for the old x copy beside the email you got when you purchased or the box if you bought the box it will be on the inside. This are the only things I do know.