It seems that the directory for the iOS Simulator has changed. It used to be in ~/Library/Application\\ Support/iPhone\\ Simulator/ and now it\'s in ~/Lib
~/Library/Application\\ Support/iPhone\\ Simulator/
~/Lib
I didnt see the configuration shell script on that page. I did the following and it worked for me:
http://raptureinvenice.com/getting-the-charles-debugging-proxy-to-work-with-ios-and-genymotion/