left mouse button does not work again
 

After downloading Limewire, every time I opened it the left mouse button would not work only on Limewire, but would work everywhere else. Someone here suggested I remove Java and reload it - so I did. It worked OK for a couple days, then the same problem. I removed & re-installed Java again and again it worked. Since then it has stopped again; I have removed Java 3 times (using off-line installer), but to no avail. Also removed & reinstalled Limewire - no use. Please note I shut off my PC most nights. I am using
Limewire 4.12.6 and jdk6. What's next ??