Ignore TTHome for starters (don't let it open when you plug in your device to your PC.)
Assuming the map you want does have a meta then just copy this map FOLDER across to your device, run FastActivate buttons 1-4 and that should get it up & running.
Alternatively delete all loose FILES from the memory & let TTHome incrementally update your navcore to the correct/current/latest 9.540 then try again
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