After a while of running Limewire, nothing happens when I double click the systray icon for Limewire. I also can't exit, or select the "About" screen, either.

The biggest problem is that if I kill Limewire in the task manager when this happens, all my downloads become useless - Limewire says something about that it can't restart the downloads.

How do I fix this? How to I manage to shut down Limewire right now (because it's happening as I type this) and not lose the progress on my downloads?