Yo, random idea that I just had that I'll throw out there:
What if Dewin Prentis is maintaining the anti-technology curse per Vladek's request? Perhaps Vladek could be intentionally hampering thedude so that he will have an easier time when he finally betrays him. Vladek's a knight, so I doubt he would like seeing a bunch of technology marring his land of Morcia anyway. Or, maybe Dewin Prentis isn't even maintaining the anti-technology curse at all. Perhaps when KotOS find Prentis, they are surprised to find out that Prentis is not the cause of the curse, and later they find out that Vladek is actually the one keeping the curse alive.
Of course, the current version of the story works too. These were just some ideas I had when I was brainstorming about KotOS, so I thought I'd throw them out there to get your guys' opinions.