Did you install Java 1.6, or did you use the Java link in the 'fixes' thread?

used JAVA link. i think i've fixed it. limewire was acting like it wasn't actually shutting down when i would "x" out of it. so when i would try to re-enter it acted like it was still running and not let me back in. so i went into options under shutdown proceedures and clicked "shut down immediately" and now it works! trouble is, i don't remember having this option checked when i was on before i tried boosting the speed on limewire with JAVA upgrades. don't know, but i hope this helps someone else.