I said, that I found it on my computer which I paid for, although I purchased it when I was working for my company, it has nothing to do with them.

I can't email them and say "Hey, register at talkfreelance.com, and see if this is the real deal".

I'm sure you can email them as the buyer, as a confirmation code is confidential, and so is my email. If you are interested and wish to see screenshots of the software setup on my site, I can do that aswell.