Following your tip, it seems the two plugins can work together and I improved the hosting speed performace, but now there is a new problem: it’s not possible to navigate by clicking on the entries of the top menu after the first click on them. It seems like the optimization has been applied only on the homepage, but if i try to use the voices on the second level menu it doesn’t work. Is there a way to solve the problem or to uninstall completly both the plugins, restore all the native php, css and js files, without the risk of compromise the web site and its functionalities?