I recently replayed the first Dana Knightstone game and enjoyed it just as much.
Boomzap, the developer, apparently has stopped making HOPAs. Looking at their website, their focus seems to be on mobile games now. But I have also in the past year or so seen their name on both a time management game as well as a match-3 game for the PC.
I like this developer and am sorry that they are no longer making games like Dana Knightstone and the Awakening series.