A foreman updates daily progress on a laptop in a trailer without internet. At the end of the day, they plug the USB into an office computer, copy the updated file to the main server, and the project manager reviews the Gantt chart. If the office computer lacks ProjectLibre, they just run the portable version from the USB again.
While the standard installer is excellent, it leaves footprints on your host machine—registry entries, AppData folders, and configuration files. This is where the portable version shines. projectlibre portable