Just make sure Limewire isn't still running in your Task Manager (Ctrl-Alt-Delete)...If it is in your Processes select the end now option...
If that isn't the problem try these fixes...
Try uninstalling all versions of Java from the add/remove programs and then re-install the JRE 5.11 offline version....
Archive: Download Java 2 Platform Standard Edition (J2SE) 5.0 Update 11
Also try deleting your preference folder/s...
Fixes for Limewire when LW isn't operating as it should