Originally Posted by davidfor
I agree with what the others said, but will add something else for the beta testing. When doing this, the developers sometimes specified a start state. Some of the beta firmware required a factory reset followed by an update to the latest release. Some of them required the download of a beta version of the desktop application and running that before installing the beta firmware.
I agree too, nevertheless, it WAS designed to be updated via manual installation. Hence the success most people have doing it. Unfortunately, we also hear of failures when updating via the sanctioned method. Nothing is 100% certain.