Super_Secret.rar problems

[drunkmonk]

Hi everyone, I have the steam version of amnesia and i'm having trouble accessing the super_secret.rar file. Everytime I try to open it, it try's to open in notepad, im not sure how it got this way whether I was doing something in the "common" folder and accidently changed something without realizing is at the time but I can't access the file at all and I don't know how to fix it. Any help would be much appreciated.