Update 4 contains the most recent versions of SpoutSettings, Demo programs and SpoutPanel for sender selection.
SpoutSettings is improved to provide Reload, Reset and Diagnostics as well as an option to disable NVIDIA “Threaded Optimization” which can affect texture sharing, evident as reduced frame rate. Run it once to set up options and to register the new programs.
The update can be found on the Spout downloads page.
SpoutCam is now a separate installation and is discussed further here.