You MUST always use the normal online installer.
Sorry, I was misunderstood.
Initial problem was: FSDT Live Update (license for P3D) started but then ended immediately after < 1 second.
Normally, the orange window finds some downloads, but not last saturday: whoops - and it closed itself.
I thought about a problem with my FSDT Live Update, and to solve it, I did what I shouldn't have done (sorry

, thought it would clean up the FSDT environment)
But I didn't read the thread title: "GSX Support
MSFS" - and own only a license for P3D, not for MSFS !
I don't want to use GSX for MSFS. And I even rarely use MSFS itself (bought it on Steam discount week shortly ago and just to peek

)
So my question is: does this installer from the "GSX Support
MSFS" something with my new MSFS 2020 installation ?
Or does it know that I don't have a license for MSFS so simply ignores it ?
After executing the offline installer (sorry once more) I didn't find any changes in MSFS 2020, so nothing seem happened, and that's ok - or do I overlook something ?