Well, I can't explain it, but suddenly I'm back where I was.

Getting minimum 30k and peaking at over 100k on the same downloads I tried using 4.0.x Pro. According to Limewire there should be no difference, but for me there certainly is. I connect to more Ultrapeers - and connect faster - and seem to be able to d/l from more hosts.

It will be interesting to see if I become an Ultrapeer again, as I was before the 4.x "upgrade."

Thanks stief and everyone else for the suggestions, help and support.