If you got LW from the official site then it doesn't have viruses. But that's not to say it hasn't been infected by something you've downlded. I don't know what that name means. Every anti-virus producer have their own names for virii.

Perhaps you should allow bitdefender to do its work. If LW doesn't work properly after that, then uninstall it & reinstall it from here http://www.limewire.com/english/content/download.shtml
If bitdefender again detects something immediately after installing a fresh version of LW, then it shows bit defender doesn't work properly. But what Application.limewire.A means I don't know. It may well detect the magnet links or something like that & think it's something bad or ???