When I searched for a song, I selected one file and double clicked it. A short message came up and said something along the lines of "Limewire has trouble or your programs have trouble playing this file, would you like to download anyways?" i clicked the box for "Always use this answer" and clicked the "No" button. Now i cannot download any files. Period. Is there a way to reverse what I did? Please, if anyone can think of a (possible) solution, please post. Any help is appreciated.

Wasn't it more along the lines of "Limewire could not find a license...."

Look at the post from Lord Of The Rings in this thread

How to fix License issue (Click on me)

Thank you soooo much! I didnt realize it was that easy.