Is this about Ornatrix for 3dsMax or for Maya? The forum is for 3dsMax but you mention Maya.
Please copy the file Ornatrix3dsMaxSetupFilepath.txt if it is about 3dsMax, or OrnatrixMayaSetupFilepath.txt if it is about Maya, from the folder
C:\Users\USERNAME\AppData\Local\
of the user who made the installation to the corresponding folder of the other user (who gets the error message)
Ivan Kolev (Software Developer, EPHERE Inc.)
E-mail: ivan.kolev at ephere dot com
Discord: ikolev