I think it's in the Add/Remove programs.
Once I got it removed, my Firefox functionality was still hosed.
I like the fact that I can just type "Youtube" or "Facebook" and
Firefox just goes there, without making me chose from a search
page first.
AVG took that away from me.
Even after I removed the Yahoo search bar, Firefox still went to
a search page every time I typed a basic location.
I even uninstalled Firefox and reinstalled it. AVG still had control.
I found no settings in the AVG control panel to "undo" this mess.
I uninstalled AVG, reinstalled Firefox and all was well again.