This was really useful to me, thanks. I had the same thing, the whole 12GB+ of Cubase Pro downloaded, then the SDA just sat there, sending my CPU nuts for 10+ minutes, ‘aria2c’ process hogging it. Zapped the whole SDA, this time said “don’t install aria2”, but it did exactly the same - was about to try again, but found this post and just left it there. Came back to look 30 mins later and there it was, ready to go. So it worked fine in the end, but I agree, it’s pretty frustrating that there’s no progress indicator or really any sign in the SDA UI that it’s doing anything at all.