I was in MSFS 2020 (Steam version) and fired up the desktop version of Navigraph Charts. A popup message appeared that there was a newer version that would be available to me when I restarted Navigraph - which I did. Unfortunately Navigraph Charts no longer worked! Once out of MSFS, I downloaded Navigraph+Charts.exe from the Navigraph website and ran it, but it failed indicating that it couldn’t find the uninstaller. I then ran Add and Remove Programs and tried to uninstall Navigraph Charts but that failed. I then - successfully - removed all the other Navigraph related apps, rebooted and ran Navigraph+Charts.exe again, but received an Installation Aborted message.
I have included screenshots of the Add and Remove Programs message window; the Navigraph Charts Setup window; and, the log file from the failed install attempt.
Hopefully this information will help in solving my problem.