[Plugin: Comprehensive Google Map Plugin] Transfer the KML filename as a variable

I use the Comprehensive Google Map Plugin to display a KML file in Google Maps. So far so good. However, the contents of the KML file changes frequently but Google Maps still shows old versions of the file for quite a while. I assume that due to caching on Google side refreshing of the contents is very slow. The only safe way to fix this problem is to give the kml file a new filename every time the contents changes.

In the Comprehensive Google Map Plugin I have to input the filename by hand as text. Is there a way to transfer the filename to the plugin as a variable? That way my program could generate a new filename and transfer it ot the plugin.

http://wordpress.org/extend/plugins/comprehensive-google-map-plugin/