license already registered?!

Kilspringer

My father recently gave me a Traktor S4 mixer mk1 (pretty old). he also gave me the installation disc. everything was going smoothly until it came time to activate the Traktor software (with came with the disc). first of all. it directed me to "service center", which I soon found out was discontinued. so I just said "F it" and chose to just use the demo version for now. then I got the idea to activate with native access. I saw that I had the demo version in my installed list. I then put in the serial number (that came with the installation disc), it said that the product is already registered under that serial #. My dad does not remember any of his login information. im not sure what to do now. is there any way I can use the same licence on 2 different computers? is there a way to just upgrade within the Traktor software?

mykejb

You need to get the licence transferred to your account. Put in a support ticket, explain what's happened and they should be able to help you out. You can access support here - Purchase & Account – Native Instruments (native-instruments.com)

The S4 MK1 came with Traktor 2, so you may need to buy an upgrade if you want to use TP3.