Problem with cloud9

Tell us what’s happening:
Hey campers,I messed up with my cloud9 workspace settings such that when i create a workspace,I do not get the preview and run button at the top right corner of the editor.I need the preview button so i can be able to look at the app that i am making.I am new to this IDE and doing anything to learn it.May I have someone’s help to reset my workspace to the previous state.Thanks.

Your code so far

console.log(typeof 0);

console.log(typeof []);

console.log(typeof {});

Your browser information:

Your Browser User Agent is: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36.

Link to the challenge: