i just download and installed Advanced Search.
Within the component config you can select to show the different tabs:
Allow Advanced User Search Form: Select No and it won't show the Advanced Form ie Expert
Allow Simple Menu 1: This is the basic one ie one text box. I set this to no
Allow Simple Menu 2: This seems to be the one that searches specified fields.
I set this to Yes.
My only problem now is that the output is not coming up