I went to BestBuy and bought a new micro-SD card and an adapter to plug it into my Mac.
I used "Disk Utility" on my Mac to copy the contents of the original card to my Mac.
I used balenaEtcher to migrate the copy from my Mac to the new micro-SD card.
I plugged the new micro-SD card into the StellarMate (SM) and powered up the SM.
As expected the stellarmate HotSpot did not appear.
I then downloaded the file StellarMateOS_1.4.6_rpi3.img from the StellarMate website.
I used balenaEtcher to migrate that img file to the new micro-SD card.
I plugged the new micro-SD card into the SM and powered up the SM.
Now the stellarmate HotSpot does appear.
YAY

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