The Tornado software is generally distributed under the GNU General Public License. Please note that MATLAB source is proprietary and that some restrictions on MATLAB usage are in effect. See more in your MATLAB license. The design of aircraft is heavily regulated in most parts of the world, make sure you fulfill all juridical requirements in your location before doing actual design. Tornado outputs may be considered munitions in your country, if so do not export results without proper authorization.
CONDITIONS OF USE
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public license as published by the Free Software Foundation; either version 2 of the license, or (at your opinion) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
Developers or companies who require a closed license of Tornado should contact the sales team for a commercial license.