Using Garmin Express v7.8.1.0 for Windows.
I was able to update my Nuvi 50 with the latest maps, but the region is set to the US 48 Lower. I've installed an SD card and and would now like to install the US Full maps. All of the online docs say to select Map Options -> Change Map, but there is no Change Map option... only an option to Reinstall Map.
The Info page shows the SD card is empty and available.
How do I install the Full Map set?
Thank you