Currently, I'm using Limewire 4.0.8 and I've tried copying Limewire 4.1.9.666 to my previous Limewire folder which is 4.0.8. Also, I tried clicking the limewire.jar and it wrote... "Could not find the main class. Program will exit!" When I re-run Limewire, it wrote "Limewire is unable to load. Please install or download Limewire again!"

What should I do now? Thanx!