eventually got it to the stage of pressing the update button, I proceeded to press the button, it started to update the file and then to my horror it disconnected itself half way through and came up with a file error message. I may be new to the drones scene but I am computer savvy and the esc would now seem to be bricked, that is unless there is a back door remedy.
I know you said that the esc should have not needed to be calibrated but 2 props were starting before the other 2 and on its 1st flight it did not get of the ground as it flipped straight over smashing 1 of the props. The props were running at different speeds.
I'm at the stage now whether to go and get separate esc's and dumping the 4 in1.