Hi , I just tried the Angular.js course and I couldn't get past instruction number 2. It said that I had to open the index.html to edit it. That's great except that I can't access it . Next to app.js at the top of the code editor, there is the + symbol where I can navigate the files. I can see lot of folders and index.html except that I can't click on it. So does anybody know what is going on?