You can download a Microsoft Windows installer setup (msi) file to install PhotoTagStudio on your computer or the sourcecode to compile it yourself.
To run PhotoTagStudio you need the Microsoft .net 2.0 Framework. (see links).
PhotoTagStudio 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 option) any later version.
PhotoTagStudio 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.