NAD D 3045 firmware fail

I wouldn't be myself of course to leave something alone and enjoy it as it is ie plug it in and listen to music. After careful reading of the NAD website I discovered that there is a firmware update for the NAD D 3045.

I tried doing a firmware update from V115 to 2.11 and then to 2.07 when the previous one failed. The serial number is H86 so I thought all would be well. While the BT firmware installed correctly, the MCU firmware did not. The amp has an amber LED in standby mode, when I press the switch on the remote, twice, sometimes once it turns white, no response to touch or the physical ON button. Can you please help me? Is it possible to get the original software file somewhere? How does it need to be formatted and what size USB stick for this operation? I have been using a SanDIsk 64GB formatted to MS-DOS.

Regards,

Tom