Sorry, I didn't know the .log file that Jeordanis passed to me was from this forum thread, I would have answered here.
You have a previous Ornatrix installed.
The new installer tries to uninstall the old version, which fails because it cannot remove the toolbar from
C:\Users\toru2\AppData\Local\Autodesk\3dsMax\2016 - 64bit\enu\en-US\UI\Workspaces\Workspace1.cuix
because the file is locked, maybe because Max 2016 is currently running (or has crashed).
Before that there's a warning that the installer couldn't close all applications it wanted to.
I suggest you reboot the machine and try first to uninstall the old Ornatrix from Windows.
Also, make sure you can write to the file C:\Users\toru2\AppData\Local\Autodesk\3dsMax\2016 - 64bit\enu\en-US\UI\Workspaces\Workspace1.cuix.
Ivan Kolev (Software Developer, EPHERE Inc.)
E-mail: ivan.kolev at ephere dot com
Discord: ikolev