how to upgrade the NAV600 to a NAV900.

[tucpal]

So when you go to find the map mode like this you do not have the 3D maps option
my display may be different but it works exactly the same way
press the navi button on first then press the round navi option button and then follow the pictures.











and you can not get the red theme by changing day and night mode settings.







You did delete the old data on the USB stick with the original navi 600 900 update on it
so that the USB stick was blank before you tried to download the red theme option update to the USB stick
so you only had one update on the USB stick yes.

You also should have checked that the 3D map update was installed correctly first before you tried the Red theme update.