I spent about 20 minutes trying to download Lime wire. It said to pick the application and I didn't know what that meant, so I just saved it to my desktop. When I then clicked on the folder there is only one document inside labeled "LimeWireMac.bin". When I click on this I get a warning message that says "The document LimeWireMac.bin could not be opened because the application that created it could not be found. What do I do? What application do I need?