After reading the other comments, I signed onto my (free) Ashampoo account. I left that open in one window, while I downloaded the program in another window. It installed fine.
My computer has an SSD disk, but I was still surprised at how quickly the program analyzed all my files. In less than 5 minutes after installation, I was able to locate the biggest video files that were taking up space on my nearly full drive.
I’m very happy with the program.