pioneer dj rekordbox licence key

Hello, a year ago i bought a set of pioneer dj nexus2 and a 900nexus mixer from our local agent in Malta of pioneer. I kept the boxes believe it or not and i just thrown them away 2 weeks ago. i realised that the books in each of the equipment had a licence key as rekord box asked me to download the latest version x64 version 5.4.3. as soon as i pluged in the usb port from my pc to mixer and it asked me to enter my product licence key, but since i trew the boxes away i dont have that information! Where can i get it from please? wont it work if in any site i can give the serial number of the equipment and licence key is provided?

or where can i find it online,, maybe i can give you the serial number of my equipment booth cdjays and mixer and you could supply me with new serial numbers to activate the full version of rekordbox dj 5.4.3.....