@pab567 Many, many thanks for the file. I was able to update the software successfully.
Just for others, how it worked for me:
1. Download the file.
2. Extract it to a folder.
3. Copy the folders/files INSIDE the MST2_EU_SK_PQ_P0253T folder, NOT the whole folder.
4. Paste the folders/files to the empty/formatted SD card. The first folder should be the Bluetooth folder.
5. Radio off, ignition off, Insert the SD card.
6. Ignition on, turn radio on.
7. Press and hold the physical plastic 'Menu' button on the right hand side.
8. 'Service Menu' appears after 5-10 seconds.
9. 'Update'.
10. Sit back with fingers crossed while the screen turns on and off when it is updating. 5 minutes later - success!
Good luck...........
Many thanks again to pab567
Regards,
Mark