When you start up Harvey for the first time, the scheduling box will have no printers and no tasks listed. Click on "Add Task" .
Select one printer at a time to schedule. After one printer is scheduled you can click "Print Now" to watch Harvey work.
After selecting the printer, select daily or weekly. Weekly can include any combination of days, to be repeated every week, such as Monday, Wednesday and Friday. Repeat this scheduling for each printer which that version of Harvey will support.
When the scheduling is set up the way you'd like, just close this screen (red X in upper right) and Harvey will work in the background.