Installed the beta to the default location in appdata\local\programs and after a few minutes of the application running the entire folder disappears. The folder in Community remains but the app to install/remove/update the navdata is gone and has to be reinstalled.
I am using Windows Security, no other AV programs, and I have the appdata\local\programs folder excluded from scan. Also, Windows Security reports no recent activity, nothing in quarantine.
Maybe related, maybe not, I lost all ILS and all airports globally. I reset MSFS and got them back. But when I updated to cycle 2105 rev 4 (from rev 1) my ILS no longer works at any airport in any aircraft. Like I said, maybe related.