Hello.
You probably solved the problem, but that may not be the best way to solve it.
If you update the plugin in the future, your code will be lost. So its better if you add this to your .js file, or in the footer between the <script> tags.
// reload after clearing favorites
$(".simplefavorites-clear").click(function(){
setTimeout(myTimeFunction, 1500);
});
function myTimeFunction() {
document.location.reload(true);
}