Unless otherwise specified, wimlib and all programs and scripts distributed with it, including 'wimlib-imagex', are released under the GNU GPL (General Public License), version 3. See COPYING.GPLv3 for the full text of this license. However, as of version 1.7.0, the following exception applies to wimlib itself --- that is, the shared library or DLL file: If you do not use the libntfs-3g support in wimlib --- that is, your application never uses the flags WIMLIB_EXTRACT_FLAG_NTFS or WIMLIB_ADD_FLAG_NTFS, or wimlib is not linked to libntfs-3g at all, such as is the case for the Windows builds distributed on sourceforge.net --- you are also granted the rights of the GNU LGPL (Lesser General Public License), version 3. See COPYING.LGPLv3 for the full text of this additional license.