Ok, I've solved riddles 1 to 11 and have those files. I also accidently found a clue that lead me to files 14 to 17. I'm stuck on Riddle #12 (I'm seven times seventy...). Can someone send me a hint in PM? I found the others without having to look to net searches, but I caved and tried to find this one in Google and didn't have any luck.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi