First, if you have installed Ornatrix using the MSI installer, uninstall from Windows the version you have currently installed (probably it says Demo in the list of installed apps).
Then on the Downloads page here make sure you get a build from the section titled "Ornatrix 3dsmax V8", not "Demo Version".
Ivan Kolev (Software Developer, EPHERE Inc.)
E-mail: ivan.kolev at ephere dot com
Discord: ikolev