At about 2hrs flying time after downloading 5.0 the airspeed bar turned gray no yellow, green or red V speed indication. Airspeed indicator is fine as is everything else. Don
Double-check all of your v-speed settings. If they look OK, change all of them by a knot or two, then back out of the menus. Then power down with the left button, power back up, and change them back to the values you want.