I was able to add "Gnutella/Limewire" manually, and included 6346 in the port number. I did this before opening Limewire.

I am still having the same problem. Getting plenty of songs in the list, and able to select one to download, however the download stays on 0% progress. Further, all songs are assigned an icon in my "Incomplete folder".

I am running the Pro version and have a "Turbo-charged Connection".