Thanks for your reply.
Deleted the pkg file and opened the Limewire dmg file, double-clicked it and clicked on Install LimeWire. LimeWire was installed but when I double-click on icon I notice the lemon bouncing on the dock and then vanish. I did notice that it took just a few seconds to install the program, which was odd to me. I went through this routine several times and was always confronted with the vanishing bouncing lemon. I have LimeWire 4.9 Pro, so what I did was download 4.10.3 Basic and it installed properly -- although I have to confront that upgrade pop-up. But, hey, it's better than nothing.
Thanks again.