Setting Game Controls Back to Default?

[xwingman099]

While playing with the mod pack, which I would also like to say that I am really enjoying the mod pack, I was trying to look at the controls for the game. In the process, I accidentally clicked on the button to change controls and messed up the controls for my left mouse button. As a result I could not attack mobs. Is there any way I can restore the controls back to the default settings? Thanks!

Edited February 10, 2014 by xwingman099