You are right RonS,
no need for Testmode to update the BT.
After the maps update I tried the 'Firmware update' button under the 'Bluetooth Settings' (once it became active) as per instructions.
All to no avail, after a good 10 minutes of trying to start the update process a message is displayed in the lines af "an error occured and the update failed".
So I am curious to hear about any other method of 'jumpstarting' the BT, perhaps by copying/pasting files directely in their respective folders using Testmode.
It might help to know what the content of the BT-folder shou