Wptouch fail in customizer

Hi there,

i saw that you changed something in the functions.php but still when i try to open customizer with WPtouch it crashes and i get this error
Fatal error: Class 'Generate_Google_Font_Dropdown_Custom_Control' not found in /home/zilvertron/domains/zilvertron.com/public_html/wordpress/wp-content/plugins/gp-premium/secondary-nav/functions/functions.php on line 544

And when i opened the functions.php is is there:

$wp_customize->add_control( 
			new Generate_Google_Font_Dropdown_Custom_Control( 
				$wp_customize, 
				'google_font_site_secondary_navigation_control', 
				array(
					'label' => __('Secondary navigation','generate-secondary-nav'),
					'section' => 'secondary_font_section',
					'settings' => 'generate_secondary_nav_settings[font_secondary_navigation]',
					'priority' => 120
				)
			)
		);

Or was the update not done yet and do i just have to wait for next update wich is fine aswell if that is the case.

Thanks,

Sjoerd