With some discussion, I still have no idea where the installer is for 4.8...
So try these fixes...
Try deleting your preference folder...
Fixes for Limewire when LW isn't operating as it should
Also Optimum Online are known to shape p2p usage..Lotr has some tips on changing port numbers in this thread...
http://www.gnutellaforums.com/connec...-limewire.html