Position main menu

Hi all, i want to fix the position of the main menu as it is f.e. in www.huth-software.de. with downloading Catch Responsive ProVersion: 4.5 there is not longer a checkbox where i can select the position of the menu. see www.trakehner-sf.de please. Can anybody help? I don't want the menu jumping fom up to down. THX Simone