Sounds like the experience I had also, although I had purchased the "Game Programming Starter Kit 6.0" and tried to upgrade, but there is no upgrade option at RGT, I ended up just purchasing the DarkBasic upgrade (electronic version), from the main site.
I think I will eventually I plan to purchase DBPro when all
the upgrades a solid.
You might want to email (if you already didn't) Mr. Vanner or Mr. Bamber about the product # you ordered just in case
you might have to sort it out, so you get the right version
you want.
Regard,
Lawrence