There is no way in the context of the UI to 'delete' or 'remove' the faulty association with Java (tm) Platform SE Binary. Windows refuses to honor the request to change. jnlp application was only trying to open in IE instead of the Javaws aplication. I browsed to the correct Java Web Start Launcher executable, double clicked, with no error but the Java Web Start Launcher simply fails to appear in either the upper or lower section of the Open With panel, to allow me to select it. Had this issue with an associate at my company. It currently and incorrectly shows Java (tm) Platform SE Binary up in the top section of that panel. I visited Default Progs and attempted to switch the association. jnlp files continue to be associated with Java (tm) Platform SE Binary which is incorrect. Instead, even after a fresh uninstall and reinstall.
jnlp files associated with Java Web Start Launcher (which translates to Prog Files/java/jre7/bin/javaws.exe). Win 7 Pro, IE 11 - mandated by higher HQ.