…“Installing the base sim using a different installation folder than the default folder will only download the mandatory content. “
I can confirm that the total reinstall does NOT have to be in a different folder. After the 1.9.3.0 update, many of the functions of MSFS were broken to the point where I decided to simply uninstall and start from the beginning. I own the Premium version of MSFS. First I uninstalled MSFS using the standard Windows 10 procedure. I then used the Install procedure through the Microsoft Store to the DEFAULT directory. Following install and a PC Reboot, I also had two planes. Only when I went to the Content Manager was I able to download the rest of the 120+ “downloads” to the sim. Something is clearly broken in the installation routine.
Having said that, reinstallation fixed all of my issues except the “dumb” ATC.