Ok, I added the line and then tried it out a couple of times. It now only crashes when I klick "Later" in the "Upgrade to Pro" window. Otherwise it opens as it should.

Console:

2004-01-29 22:05:04.534 LimeWire[744] Java couldn't paint in Java_apple_awt_CRenderer_doRect, no focused view.

System:

Jan 29 22:04:56 localhost /System/Library/Frameworks/ApplicationServices.framework/Frameworks/ATS.framework/Support/ATSServer: FOExceptionMainHandler caught a fatal exception at 0x0000f314
Jan 29 22:04:56 localhost /System/Library/Frameworks/ApplicationServices.framework/Frameworks/ATS.framework/Support/ATSServer: ATSServer got a fatal exception!! Please check /var/tmp/ATSServer_233.
(This is repeated four times)