The firmware on the device is not upgradable. We don't need upgrade it actually. The firmware just convert USB to serial. Start from net version, our Windows GUI app will be upgradable. About PC Linux or ARM linux, since we will open the source code, users can upgrade to new version source code. To do a Linux upgrade, the user need have some experience on Linux.
Dualminer, I notice that on the op of this topic you mention that you can pay via btc. Why have you stopped that and do you have plans to restart it?