I had seen that reddit thread. Unfortunately, the "nephew" never answer my multiple emails.
Though I know this place doesn't advocate piracy, this is a very peculiar situation where the author of a software has died.
The problem is that said software requires connection to a license server to be activated, even if you have a legit serial number purchased when the software was still available for sale.
If you search carefully, there is a fully functioning version out there. I would not normally encourage such things, but this situation is extreme, and there doesn't seem to be anyone picking up where the author left.
@KVR admins: please don't blindly remove this post. Consider the uniqueness of the situation, and consider the fact that I'm not giving specific information. Anyone can use Google.