I’m having the same issue and can’t find a solution anywhere. Just bought Cubase Artist 9.5 and downloaded the Steinberg Download Assistant. When I click the Assistant to launch, it briefly opens and immediately closes. Because of this I can’t download Cubase which is extremely frustrating. I’ve already tried uninstalling the Assistant and reinstalling it multiple times and it still won’t launch. If there’s any way to download the program without using the Download Assistant please let me know.