My "user folder" has been shifted by me since the first day of my Windows 10 installation to E:\Juergen. However, I have noticed that the last A300 installed several files including the ASUpdater into my C:\users\Jürgen\Documents folder just ignoring my specific change. (Yes, I checked, my registry clearly shows E:\Juergen and not that what the Airbus installer used). By the way, the last FSUIPC6 installation a few days ago did the same 😞
I also remember that GSX2 for example had problems with the Umlaut ü in my (folder)name which has caused a lot of problems until they corrected their code.