I think if you download and install the latest version from your order history this problem will be resolved.
The problem can be corrected in the map include file. The images are currently referenced as:
icon_0.image = 'http://google.webassist.com/google/markers/undefined/undefined.png';
icon_0.shadow = 'http://google.webassist.com/google/markers/undefined/shadow.png';
icon_0.iconSize = new GSize(undefined);
icon_0.shadowSize = new GSize(undefined);
icon_0.iconAnchor = new GPoint(undefined);
icon_0.infoWindowAnchor = new GPoint(undefined);
icon_0.printImage = 'http://google.webassist.com/google/markers/undefined/undefined.gif';
icon_0.mozPrintImage = 'http://google.webassist.com/google/markers/undefined/undefined_mozprint.png';
icon_0.printShadow = 'http://google.webassist.com/google/markers/undefined/shadow.gif';
icon_0.transparent = 'http://google.webassist.com/google/markers/undefined/undefined_transparent.png';
Which looks entirely wrong, but could be corrected to be the valid image locations.