C:\Program Files (x86)\PRO100\ or the custom folder you chose during setup.
Check the file extensions. PRO100 4.42 uses for objects and .jpg/.bmp for textures. pro100 442 professional libraryzip install
The first step involves obtaining the Pro100_442_Professional.zip file. Once downloaded, the file acts as a compressed container holding the necessary data files (often with extensions like .pla or specific catalog files) and folder structures. C:\Program Files (x86)\PRO100\ or the custom folder you