Bavarian05 is correct - i just did this and it WORKED!
However, it is NOT the tone and balance button you need to press for 5 seconds (this only makes a factory reset), it's the balance and mode button you push down. Here is a short manual, after you've installed the recent software (version 1.9) - you can get it by writing to NAD and follow the instructions in the program exactly.
After installing:
- Shut down the amplifier totally
- Turn it on and wait for the "NAD M3" logo to disappear and the amp clicks.
- Hold the balance and mode button on the front of the amp until the display totally lids up - if you think you can see words, that is funny enough the functions used the most.
- Wait 48 hours, DO NOT TURN OFF THE AMP.
- After 48 hours, if the amp has not gone back in normal state, you can now put it in standby and then turn it all the way off and let it be turned off for at least 10 seconds before turning on again.
That should do the trick :) if anyone needs it, put your email and i will send the installation file from NAD. Remember to use a USB-->RS-232 DB-9 cable, and installing the driver before using it, then everything will go smooth.
Regards Jonas