OMG ... I do feel sorry for you. O.o .. Unfortunately you purchased a program from a scam site. Chances are it is not even LW Pro. The official LW site do not advertise, nor do they offer unlimited anything. Perhaps you should see these links: get your $$$ BACK!!! (music members) & also this one Known Scam Sites (click on link). Yes please ask for a refund ASAP. If they refuse, contact your credit card company & tell them it was an online fraud. They usually have special departments dealing with fraud. With luck your CC will recover your money.

Get LW from the 'Official' site, but start with LW Basic first until you know how to use it well. It is free: Lime Wire » Download LimeWire

As for the so-called audio songs you downloaded not being compatible, it's my guess they are all fakes; spam. See both Virus thread: Typical virus spam file sizes - Make a note of them (click on blue link to see) & also How to find music