1. Remove all versions of Java you have. Reboot. Reinstall Java using only the "Offline" installer;
http://www.java.com/en/download/manual.jsp
2. Reinstall Limewire using the Offline installer;
http://www.limewire.com/english/content/download.shtml
3. Be sure you have actually deleted the LW prefs folder because there may be another location; try deleting your LW Preferences folder whilst LW is
closed; instructions here:
Point #2 & 3 in Fixes for Limewire (sample image included at bottom of page.)