2) Run TomTom HOME and go to the "Operate My ONE" function
3) In the menu, add a new Favorite - any favorite (you can always delete this later).
4) Reboot. Test.
The above procedure saves the mapsettings.cfg in the correct format. It only needs to be done when encountering rebooting problems like this.
If you can't get into the Operate function in HOME, then you need to patch HOME with FastActivate Premium Edition.