All the fixes in that thread are worth a try incase the Java doesn't solve it

Also did you by any chance install Limewire using the online (recommended installer) ? If you did then try the offline installer and remove your current limewire (Don't use add/remove programs. Go to Start>Programs>Limewire>Uninstall or go to your Limewire programs folder and execute the uninstall file) Then install using the offline installer