Your welcome. Sorry to hear you accidentally bought LW from a scam site. If you don't wish to share files p2p (from one user to another), then buying them is the next best option either online or offline.
The problem with viruses etc. is not LimeWire, but what some
sponsored groups spam the gnutella network with in an attempt to prevent copyright sharing. There are many gnutella programs, LimeWire is simply one of them so you can't exactly blame your particular thoughts mentioned above on one particular program. p2p which includes torrents is obviously not for you.