Hi, I'm not a lawyer but I would assume that no licence (except the one you licence your application under if any) would be required as the user would of already agreed to the Flash Player license when it was installed. [1]
Thanks, Justin 1. http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/legal/licenses-terms/pdf/Flash%20Player_11.0.pdf
