FreeFlyer for Windows is a 64-bit application which requires .NET 4.7.2 to be installed on Windows platforms in order to function correctly. The proper .NET installer is available alongside the FreeFlyer installer. Once installed, both the standalone integrated development environment version (FreeFlyer.exe) and the headless version (FF.exe) are available for use. For detailed instructions on installing FreeFlyer for Windows please follow the link below to the FreeFlyer Help Desk.