FWIW, this has not helped me. I'm running Windows 7 64-bit, and was originally using Limewire 4.16 on XP. I installed it on my new laptop running Windows 7, and it would never open; never even get to the splash screen.

I downloaded a new install of LW 5.5, and now it gets to the "Squeezing Lemons" part of the splash screen, but the progress bar never gets past around 80%. Then, Limewire minimizes for about 2 minutes, then just closes. After it closes, there are no instances in Task Manager.

I tried uninstalling Java, then reinstalling. I've also tried installing the 32-bit and 64-bit versions of Java together. But still, I can't get it to launch.