I didn't originally want people to play again, but since there are achievements to unlock, I felt bad for collectors/achievers. So, you can reset your progress by deleting the folder located in My Documents/Darkness. :)
I was going through those files and i love the quotes especially for the money choice! but what does the gibberish ones mean? is there a way to translate it or is it just gibberish lol (in the hope, fear, and despair and none folder?)