Okay! I figured a solution out by putting all the code fragments together that were posted here. This worked out for me:
Modify the framework > php > class-framework-widgets.php file via FTP like this, look for this code around line 1377:

	    $prefix  = is_ssl() ? "https" : "http";
	    $api_key = avia_get_option('gmap_api');
	    $api_url = $prefix.'://maps.google.com/maps/api/js?v=3.24&key=YOUR-API-KEY-HERE';
	    if($api_key != ""){
		$api_url .= "&key=" .$api_key;
	    }
            wp_register_script( 'avia-google-maps-api', $api_url, array('jquery'), '1', false);
            wp_enqueue_script( 'avia-google-maps-api' );

hope this helps someone. Unfortunately you need knowledge in FTP and editing Script-Files.
regards
Markus

Hey Kriesi-Team,
unfortunately it does not work for me. I had the API code in place, but when trying to fetch the coordinates, simply nothing happens. i tried it on several pages. I am using 3.7.1 ENVATO theme from 6th of August.
regards

Markus

• This reply was modified 8 years, 4 months ago by fritzbrause.