You need to keep LW 4.8 4.9 will not work on your computer afaik.
Do you still have the DMGinstaller for 4.8?
I did ask if you have done any software security updates recently as these can change the Java version, with out you knowing, which can be a pain.
>Utilities>java and you may seeone or a few Java Plug in settings. What number(s) do you see.
It might be worth deleting your limewire preference folder (with Limewire closed).
It is in Users>your name>Library>Preferences>limewire The folder can be dragged to the trash. This will loose all your configurations and shared file settings, and you incomlete files may not resume
This may not cure the problem but it's worth a try.
I suspect a Java problem, but I'm tired and going to bed. I'm not quite sure which Java you should have. somewhere in the forum I think there is a fairly recent post about this.
I'll be back tomorrow with luck, or someone will