This is the official download site:
http://www.limewire.com/english/content/home.shtml But the free version does in fact link thru the
www.download.com/LimeWire site. The most recent official release is LW 4.0.8 So you're OK.
Oh newer version, well if you were interested you could dwnld the beta 4.1.7 It has a no. of noticeable differences such as pause dwnlds, better media player, etc.
http://www.limewire.com/english/content/beta.shtml Or find out about improvements at
http://www.limewire.com/english/cont..._history.shtml