The answer you have received from NNG is the standard one they are sending to each person, person which is contacting them for any issue. They want to check first if your SW is purchased with licenses, or not! If you will send them the archive with the license folder, it might be possible to receive an answer in which they will notify you about the fact that the SW you are using is not original. My advice is to don't send them your license archive.
On the other hand, the SW which could be founded on any forum, for sure isn't the original one, because no one will put his original SW at free disposition on a forum.