Adult Content
 

Just joined the site and wondered......if you download adult content by specifying a search word, I notice that that word pops up when try to type something that starts with the same word.

For example: if you typed in "boob" for the search word in images, if you went to type in "b" for "bird" the next time you used Limewire, the word "boob"shows up before you spell "bird"

Is there any way to cancel past history searches to run a clean slate from minors?

Tools->Options->View->Autocomplete. Untick the box to disable the function.
If, however, you just want the search history to be erased without disabling the autocomplete function, then Quit and Restart LW.

Just wondering: when you say "joined the site" do you mean that you are paying for it monthly? If yes, you were scammed.