Got the current Humble Bundle and many PDFs with it. Great stuff, but so I faced the assets pages which needs search - click - wait - click - click for each file, and that's when you don't accidentally click an entry you don't want (like the one-file-per-chapter version).
Now I got the itch to redesign the entire page, but I guess you have other things on your plate. Some less drastic things that would already be very helpful:
1) A stern look at grouping. The first 15 Wayfinder books are scattered over 7 groups, and for some reasons there are two Player Companion groups and two Campaign Setting groups.
2) More prominent markers for "Single File" and "One File per Chapter", like a bold font weight. Or maybe a symbol before the long product name.
3) A "Download today's additions" button.