You have answered your own question really, the only way you will get a serial No. is to contact Nero and then you will have to satisfy them it is a genuine copy, or buy an upgrade that will do what you want it to do...
OnePlus 5T review: Hands-on
Illustrator Andrés Lozano on his improv line work, brazen use of colours & hand sketching
iPhone X review
Comment envoyer gratuitement des gros fichiers ?