So, I bought this new Amplify 75 amp and upon trying to update the firmware, it appears I put the unit in Return-to-Sender mode. I have not been able to get this unit to respond. I tried everything mentioned in the support forum. I even went out and bought a USB cable. I even tried three different devices in an effort to update the amp. No luck. I just keep getting blinking lights on the amp. So, my question is, who in the world thought this was a good idea to manufacture something this finicky? This thing is going back to Amazon in the morning. I dont have time or patience to deal with something that should be so simple. Insert cord, attached guitar and play some music. Simple as that. I guess simplicity totally by passed the folks at Line6 because this is a freaking nightmare.