as a Canadian boarding school , we request everything to display in Canadian dollar. however, the Blackbaud Support Case 018268693 confirmed: "we are currently only able to display the US Dollar Sign ($) on the Statements within Billing Management. We are not able to make any sort of updates to this functionality via Support."
we are unable to use the product(Billing Management) with US Dollar Sign ($) on it.
I will follow up with Support on this one -- we actually have worked planned for our current sprint to remove all the US$ everywhere and just show $.