I've installed the new version in my local WP installation, which has the debug constant enabled, and noticed these three warnings starting to pop up:
NOTICE: D:\Site\www\wordpress\wp-content\plugins\wp-google-maps\wpGoogleMaps.php:1133 - Use of undefined constant wpgmza_pro_advanced_menu - assumed 'wpgmza_pro_advanced_menu' NOTICE: D:\Site\www\wordpress\wp-content\plugins\wp-google-maps\wpGoogleMaps.php:290 - Undefined index: page NOTICE: D:\Site\www\wordpress\wp-content\plugins\wp-google-maps\wpGoogleMaps.php:295 - Undefined index: page
Also, right after updating from 5.01 to 5.02 three warnings about failed database structure update attempts appeared, but I forgot to write them down.
In any case, the plugin seems to be working fine.
I hope this helps!