Got to box apps on main screen look Update&Backup .
Click to open .
Then you will see on top right Online update icom .
Click & box will search .
you need to confirm you want to update
then will ask update now or later.
Since the download/install failed and since factory reset via menu also failed I ended up
doing a "hard factory reset" ( pin + power - into android "background" )
Then OTA download/install worked and I'm now running 106_MO.