Thanks for the swift answers:

- Completely formatted the USB (FAT32)
- Downloaded image 3.0268
- Copied dir Vuplus to USB directly with all contents
- Turned the Ultimo off and let it cool down for a minute
- Put the USB in the front USB and powered the Ultimo without pressing the "-" button (NO RESULT)
- Switched off. Put the USB in the back USB and powered the Ultimo without pressing the "-" button (GOT FLASHED)

THANKS for the support

Was not aware that there was a difference between the front and back USB