Sorry for the late reply. Here you can find informations about TTActivator:
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First: you need the menue from picture 2, select "Update Meta"
Second: you need the menu from picture 4, select "Map Kind/Generation" and there the selection "nav3-fuji". This are the NB1-maps. Select the desired map from the selection-menu below, e.g. "Europe" or one of the NB1-zone-maps.
Third: set the temporary download folder and the target folder. Recommend is downloading the map to the computer, then copying the map folder to the memory card.
Fourth: Connect your prepared new memory card (with patched NC, created ttgo.bif and new NB1-map) with your computer. Select "Installed Content" from the TTActivator main menu. You should see a window like this:
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Click on "Activate". You should get this (depending on the selected map):
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That's all. Go to your car and insert the memoy card. Turn on the NB1:
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Select the green tick (or wait for the countdown). Then wait for the update:
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After the automatic restart the NB1-Info-screen should show the new NC and the new map:
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Finished.
Thanks to @Schwan for the NB1 pictures.