I have written about keeping build agents up to date in the past and had issues with the vs_installer updating itself. Now again the latest updates were not deployed.
After playing around with procmon and friend I found a way to remove its state, so that the installer thinks is starts from the beginning of time - so there is no update. To do so I delete a few folders before starting the installation. I updated my gist file, but cannot update or comment the VisualStudio developer community page, as the issue is closed.