Will not Download

I have tried installing multiple versions of LimeWire on my mac (OSX). I install everything properly...even restart the computer. No matter what I do, LimeWire won't let me download any files. It shows me all the files I can download, but when i double click or press the "download" button, nothing happens. This really frustrates me because, long story short, my cousin erased my harddrive and I've had to reinstall all of my programs. I hadn't had the newest version and it worked fine. Now that I have the latest 4.9.5, it doesn't work. I am so sad without music! AHHH

and something different that i noticed is in between quality and the track #, when i search for files, it says "liscense". I have not been able to find out why, and call me stupid, but wonder if it has something to do with my problem. GAHH i wish i hadn't upgraded versions....

if anyone could help it would be so greatly appreciated....