FYI, I'm having the same issue, and am posting in this thread for the same reason as Raazan (i.e., this thread came up in Google when I searched for the problem, and I can't get at the message board [or my account] in any other way).
I just bought the Pathfinder Humble Bundle and was trying to figure out how to download it.
Might want to add a blog post on the home page explaining there's an issue, to save more people the headache of trying to figure out what's going on.