I tried 3 times to update Dragon, but each time Dragon Setup.exe was sandboxed. Each time, I answered don't sandbox again and moved the setup.exe to trusted file, but at the next attempt it was again sandboxed and the update couldn't install fully.
I rebooted the computer, same thing.
Finally, I had to disable the sandbox to perform the update.
Now version 11.4 is running smoothly.
Well, I wanted to give you this feedback.