Unfortunately, there is no way to turn off the Ads in the Free version of our software. Advertising is how we support the development and delivery of the "Free" application. Please consider that our games are free to download, play, and enjoy. That means that advertising revenue is how we support our development studio and continue to deliver entertaining high quality free games, and game updates, to our loyal fans.
If you are having an issue with one of our ads we definitely would like to investigate this if you are having a problem with a particular ad. Please send us an email from within the game settings using the Email Customer Support right after it showed, along with an image and/or a description of the ad.