Reply to Traktor S4 with no installation disc?!

So, today bought myself a used Traktor S4. My problem is, that there was no installation disc, but only a serial number with the s4...
At first i thought i could take it home, register the serial number and activate the s4 online and then be able to download the installation file for Traktor S4 Pro, from NI's website.
First of all,
I can't register softwares online, but I have to install Traktor Pro S4 on the computer and then activate the software through service center. "which is just wonderful when you dont have a CD...."
I've searched their entire website, community s and google for an installation file, but with no luck...

Any ideas on what I should do next?

Could anyone copy the installation file from their disc and post it online, or is that not an option?

I hate to just sit here next to my S4, and not be able to use it....

Thanks in advance!