Posting this because I couldn’t find anything in a search when I was having trouble installing with the Steinberg Download Assistant.
After a couple of hours of downloading HALion 6 huge file, it appeared that the SDA hung. The status bar just kept going back and forth without any indication of what, if anything was going on. I tried again and again to complete the download. It appears that the answer is not to keep trying, but to go have lunch and leave it in peace. For me it took about twenty minutes for it to finish packaging(?) after the download. I was told it can take up to forty. Hopefully that saves someone a few strands of hair. An indication that it is doing something would be helpful.