Hi
Just open isaveresolve/js/admin.js
and change all content of this file to this
$(document).ready(function(){
$('#product_form').prepend('<input id="submitSaveProductForm" name="submitProductForm" type="hidden">');
$(document).on('mouseenter', '#product_form button[name="submitAddproduct"]', function(){
$('#product_form input#submitSaveProductForm').attr('name','submitAddproduct');
});
$(document).on('mouseenter', '#product_form button[name="submitAddproductAndStay"]', function(){
$('#product_form input#submitSaveProductForm').attr("name","submitAddproductAndStay");
});
});
Thanks