On all platforms, when you click the close button on PhotoStructure's main window, PhotoStructure continues to run in the background, which may include processing images and videos.

macOS

Start PhotoStructure by double-clicking the icon in your Applications directory. You may want to drag the PhotoStructure icon to your dock to make it easier to get to.

Stop PhotoStructure either from the title bar (PhotoStructure > Quit PhotoStructure), or by clicking the PhotoStructure icon in the upper right corner of your title bar, and choosing "Quit".

Windows

Start PhotoStructure from your Start menu.

Stop PhotoStructure by clicking the icon in the system tray, and choosing "Quit". If you don't see the PhotoStructure icon by your clock and volume and network icons, right-click the taskbar, pick "Show all notification icons," and click the ^ icon. You can drag the PhotoStructure icon out of that panel and onto your system tray.

Ubuntu

Start PhotoStructure by double-clicking the .AppImage icon. Remember to make it executable.

Stop PhotoStructure by clicking the PhotoStructure icon in your menu bar (in the upper right corner of your screen, by the data and settings widgets), and choose "Quit".

Photo by Carlos Alberto Gómez Iñiguez