Help with Limewire

I'm new here, and I'm not sure if this is tha right place to ask, but I'm desperate. When I open Limewire, a window pops up asking me to upgrade to Limewire Pro. Normal I just click later, but recently whenever I try, my clicking seems unresponsive anywhere in the limewire window. Can any1 help?

Thankss loadss

I get the same window when I open LimeWire. Try clicking on the X button in the top right corner. That's what I always do.