How can I restore Unity to it's Default Settings?

Greetings, I apologize if this has been asked before but for the life of me, I cannot find any answer to my question. I was following a tutorial on adding Character actions and I ruined the Javascript. Now now matter how many times I delete and re install Unity the settings remain. This error is particularly with the Third Person Controller script. I just want to start fresh. I am running on Windows 7. Any help would be GREATLY appreciated!

is it the 3rd Person Controller that comes with unity? If so you can reimport it by going to Assets > Import Package > Character Controller

Thank You so much for the help! I am just leaning the ropes, but this got me back on track!