Did you use the LW-Java shortcut installer?
http://www.gnutellaforums.com/window...installer.html This will create shortcuts to the necessary file that works in Java 7. So you will then see shortcut to LW in start menu and wherever you choose that actually works.
Choose the option in the installer that matches your version of LPE. If the shortcuts are simply named LimeWire then it was File_Girl's version of LPE. Otherwise if the shortcuts are called LimeWire 5.6.2 then it was the original Metapirate version of LPE.