Hello.
Thank you for the recommendations.
I tried the installation using the .exe file:
Start-Process -FilePath C:\temp\mattermost-desktop-setup-5.9.0-win.exe -ArgumentList "/DIR="$env:ProgramFiles\Mattermost""
But the Mattermost client is still installed in the user profile:
C:\Users\username\AppData\Local\Programs\mattermost-desktop
I think there are some issues with the new version of the client