Kenwood KPG-D1 software is well protected and cannot be activated just by serial number (unlikely classic Kenwood KPG software).
Also, it's not hacked yet.
There is only one way to get it working: to buy a license. They are not easy to get because most Kenwood dealers are not user-friendly and mostly refuse to deal with individuals. The easiest way to make KPG-D1N work is to buy a license on the Internet. Go to any Kenwood USA dealer list, e.g. https://nx5000.com/dealers and order from any reliable / trustworthy dealer.

DO NOT ASK US FOR FREE LICENSE, CRACK, PATCH, FIX, ETC. THEY DON'T EXIST AT ALL!

We will not be able to help you get KPG-D1 for free.
And here in files, we offer just official Kenwood software distributions with the KPT-300LMC license client.
But nothing else!