I made a desktop shortcut and added the :streamto command to the target.
It works great on my machine.
The device name ‘Olive4HD-Renderer’ is the device name from the SWYH options panel. There is a space between the streamto: and the device name.
Target: “C:\Program Files (x86)\Stream What You Hear\SWYH.exe” -streamto: Olive4HD-Renderer