When I try to load a puzzle, there always comes up an error message:
"Error during initialization:
Error writing puzzle ID."
I donkt know, what's wrong because I already have successfully loaded some puzzles in the past.
I have the same problem, when I try to start I get the message:
Try to launch Foldit° with administrator rights on your computer. I mean, don't double click on it, right click and choose "launch as administrator" or such in the menu. It solved the problem for me. Good luck.
Try NOT install it in "program files" directory - tis solve admin rights problem.