I had no trouble downloading and installing this, but then I already an account with Ashampoo.
Their website has the same program for free, so those having trouble with SOS version could try the one from the website.
The two files have different MD5 checksums, so they are different. I didn’t dig into what the differences are.
I also have Ashampoo Disk Space Explorer 2018. It gives a nice pie chart and shows the bars next to the pie. The 2023 version shows bars (indicating space usage) in the same space as file/folder information. For me, that makes it easier to see what’s going on, and more files/folders can be listed. So, while it’s not as nice to look at, it’s easier to understand. A rare case of a program being “improved” and it’s actually better!