You can update the port number for the "Admin" buttons on XAMPP Control Panel by: 1) click on "Config" button on the top right corner. A Configuration of Control Panel will appear. 2) click on "Service and Port Settings" button on the right bottom corner of Configuration of Control Panel. Service Settings window will appear. 3) You can update the port number for Apache at this Service Settings window, and the URLs for the "Admin" buttons will get updated.