Space Ranger4.0 (latest), printed on 05/26/2020
First, download Loupe Browser from the downloads page.
Loupe Browser for Windows is distributed as a self-installing .exe file. Double-click on the downloaded file to install.
Follow the prompt to choose an installation folder. After installation, open Loupe Browser by double-clicking on the desktop icon, or double-clicking on a .cloupe file on your computer.
Loupe Browser for macOS is distributed as a .dmg file. Double-click to open the file. Then install Loupe by dragging the Loupe Browser icon into the Applications folder. Open Loupe Browser by double-clicking on the app icon.
Loupe Browser can then be opened within the Applications folder or by double-clicking on any .cloupe file in the Finder.