Upgrade problem

Yesterday I downloaded and registered DEVONagent 1 (thanks for the freebie, DEVON and MacAppADay!) but I have been unable to get the promised $20-upgrade coupon for it. The form message boils down to “we can’t find you in our files.” Hey, Devon sent me the registration number for DA. And I have owned DT and later DT Pro for years. So what do I have to do to buy the upgrade? :question: