2. Install app

WINDOWS: Extract the downloaded zip file to folder. Start application by double-clicking 4FApp.exe. If you get Windows SmartScreen, press "More info" text and "Run anyway".
MACOS: Open the downloaded image file and move the application icon to your desktop. Control-click the app icon, then choose Open from the shortcut menu. Click Open.
LINUX: Extract the downloaded zip file and start application.