Please, go to Microchip forum. Maybe you could find a thread about it.
I now recall trying to use it during debugging without success (18F family micro). It worked with the Simulator that I used just for a bunch of delay routines. I then returned to debugging on the hardware.
Never tried again.
When I first tried it (ver 5.25) I was surprised that I had to set two breakpoints for it to work.
I reinstalled the latest MPLABX 5.35 as well.But still the stopwatch is inactive.Do I need to plug the PICKIT3 to computer?I also set two brakpoints but still no stopwatch.