Are you going to try to do some programing or do you just want to use the program. If you are just wanting to use the program click on the link below. LimeWire basic is free to try as long as you want. Pro is $18.88 you get 6 months of support and free upgrades for your money only get limewire from the official site. There are allot of scam sites out there.
http://www.limewire.com/english/content/download.shtml