(1) Make sure that vncserver is closed and the license wizard screen is not open (2) Use our keygenpatch to patch the application. Example usage from terminal LINUX (use Admin/SUDO on systems required): ' keygenpatch patch /path/to/vncserver/ ' -> Will patch the required files So on Windows by default it would be: ' keygenpatch patch "C:\Program Files\RealVNC\VNC Server\" ' (3) Use our keygenpatch to generate your license and license file ' keygenpatch license ' -> Will generate a license and save it to license.txt for offline activation. (4) Run VNC again and under licensing choose to activate via file, providing it your license.txt (5) Enjoy!