From: inside binary shown on setup (https://wiki-de.dmxcontrol-projects.org/index.php?title=Installation_DMXC3#Lizenz)

LICENSE

Software license agreement for DMXControl; License:

The software is distributed as freeware. The software is NOT Public Domain software.
We allow the free distribution of the software, but we retain ownership and copyright of
the software and its source code in its entirety. You may use and/or distribute the
software only subject to the following conditions:

 * You may use this software on any number of computers for as long as you like.
 * You may not modify the program files in any way
 * You must include all the files that were in the original distribution
 * You may not decompile or otherwise reduce the Software to a human readable form
 * You may not sell the software or charge a distribution fee, except to recover
    the media costs
 * You understand and agree with this license and with the disclaimer of warranty
    and the limitation of liability printed below.

The software may be bundled and distributed together with other software products but
the same conditions apply.
You do not need to seek our permission first. But a note telling us about your software is
wanted. Comments and contributions for improvement of documentation can be
provided at the forum and wiki of DMXControl.de.

Disclaimer of warranty:

The software and related documentation are provided "as it is", without warranty of any
kind. The project DMXControl disclaims all warranties, express or implied, including, but
not limited to, the implied warranties of design, merchantability, fitness for a particular
purpose. The project DMXControl does not warrant that the functions contained in the
software or documentation will meet your requirements, or that the operation of the
software will be uninterrupted, error-free or complete, or that defects in the software or
documentation will be corrected.

Limitation of liability:

Under no circumstances, including negligence, shall the project DMXControl be liable for
any lost revenue or profits or any incidental, indirect, special, or consequential damages
that result from the use or inability to use the or related products or documentation,
even if the project DMXControl has been advised of the possibility of such damages.
Some states do not allow the limitation or exclusion of liability for incidental or
consequential damages so the above limitation or exclusion may not apply to you. In no
event shall the project DMXControl total liability to you for all damages, losses, and
causes of action, whether in contract, tort (including negligence) or otherwise, exceed
the amount paid by you for the software.

Copyright:

Program and documentation (c) by DMXControl team