Scan Tailor 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 3 of the License, or
(at your option) any later version.

The GNU General Public License version 3 can be found in GPL3.txt

Some parts of the program are licensed under different, but compatible
with GPL3 terms. For more details, see:

boost/LICENSE_1_0.txt
resources/icons/COPYING