Honestly, had no idea that button existed. I appreciate you showing that to me. I downloaded each image separately like a troglodyte.
Though I did change the file names to how Blackadder used to number his images and added the cover page, so it wasn't all for nothing.
Though in all fairness, it looks like there's a limit on the download button. A 10 GB limit per day, 50 GB limit per week, so it's unlikely that you max out your limit unless there's some super unoptomized files on this site.