I had trouble for months (okay, I didn't make it a priority though) and tried everything I could find. I finally found this answer on a thread and it worked. It's quick and easy to try, so you might as well try this before you start uninstalling, deleting and all that other stuff.

In windows (I have XP)

Go to Start My Computer
Go to c:\programs\program files\limewire
then click (or double click) on the file that reads
limewire.jar
(and under it says executable jar file)

Once I clicked on that, i went through the short setup language thing again and it worked fine!!!!

Don't know what'll happen when i shut down again of course, so i'm cramming in some downloads now!

I just made a shortcut of that file to my desktop.

Oh ya, I heard it helps if you disable the "start limewire at startup option" from another thread.

So I'm going to post this in a bunch of threads in case it helps anyone else.

I got this advice from another thread so thank you to them!!