Thank you Thrasher all working now.
Burned firmware 1.3.2.
I have just got my M5Stack Grey but when I connect to the PC it runs the demo sketch.
When I run UIFlow Desktop it sees COM11 but when I press "OK" it says "connecting M5 ..." then an error message pops-up saying "Unable to upload ...".
The message at bottom left of UI says "COM11" [disconnected].
Plesse help what have I missed, it is easier on the M5Stack Fire it has the option for USB mode, but the Grey appears not the same.
I have pressed all the buttons while plugging in the USB cable but no joy.