thanks a lot for the response even if it puts me in a dead end, I've already emailed ducky regarding this and I'm going to wait until I hear something from them, in the meantime I've already ordered another keyboard
honestly I'm a bit disappointed that it's even possible to flash a wrong keyboard with their tool and there was no failsafe
also the reason I flashed the new firmware was that the keyboard was double pressing some keys
looks really good though, even if the reliability is not what I had in mind
and I've had it for no more than a month