How to Hide AppPresser Admin Menus

function plt_hide_apppresser_menus() {
	//Hide "Plugins → Install Plugins".
	remove_submenu_page('plugins.php', 'tgmpa-install-plugins');

	//Hide "AppPresser".
	remove_menu_page('apppresser_settings');
	//Hide "AppPresser → Settings".
	remove_submenu_page('apppresser_settings', 'apppresser_settings');
	//Hide "AppPresser → Help / Support".
	remove_submenu_page('apppresser_settings', 'apppresser_sub_help_support');
}

add_action('admin_menu', 'plt_hide_apppresser_menus', 11);

Where do I put this code?