How to install my modeling tool in a silent mode, i.e., without the installer GUI?

Please start the installer with the following parameters:
-i silent -DUSER_INSTALL_DIR=

The example:

MD_UML_169_win.exe -i silent "-DUSER_INSTALL_DIR=C:\Program Files\MagicDraw 16.9"
MagicDraw will be installed silently, with a default configuration.