The K8090 install package contains a new tool called K8090C.exe which will be installed to the C:\Program Files\Velleman\K8090\Tools folder.
This is a console tool to operate the relays on the board without the need for programming.
K8090C.exe -p PORT -c CHANNEL -f FUNCTION
p - port name - COM1, COM2, .., COM20, ..
c - channel number - 1, 2, 3, 4, 5, 6, 7, 8
f - function - ON, OFF, TOGGLE
This example toggles the third relay of the board connected to port COM17.