tk-290 kpg-38d kpg-38dk

I tried searching the threads for an answer to this question with no luck. Apologies if this has been answered before. I just bought a TK-290 and the KPG-38D software. When I was a volly at a rural ambulance service, we had a page channel that would only open the channel after a 2-tone alert...

Does anyone know what the difference is between the KPG-38D and KPG-38DK Programming software? Thanks!