City Navigator North America NT 2023.20 to display on Basecamp 4.7.4

How can I have City Navigator North America NT 2023.20 to display on Basecamp 4.7.4 as a selectable map?  I am running Windows 10 and Zumo XT. Thanks

Right now I cant see it on the maps pull down menu to create routes, but I can see it on the Device