Mac Mini running Mojave 10.14.6 SC used to work just fine on this
machine, then the old Rollo printer broke and was replaced with a Godex.
Could not get it to show on SC. So I uninstalled SC per this page:
One other thing - after installation it skips the registration screen
and goes straight to the "connected as" screen, but the "connection
status" in the lower right of that screen says "connected, closed"
instead of "connected, open".