A European user licensed for Europe and for US maps, who wants to drive in the US, will have to follow this path:     and select Switch Map on the top of the screen; then, the default map can be changed to North America.

  

The same instructions apply to any case where you are licensed for different maps belonging to different continents.

NOTE: CoPilot will detect your position every time you launch it, prompting a message to switch map once we have moved to another continent, like the one below