When I navigate to the page that lists the books that have been uploaded to MR, I can use the "Format" drop-down list to filter the list so that it shows only the format that I'm interested. That works swell!
My suggestion is to use the value in the "Format" drop-down list to also filter the list when I click the "Full List HTML | TXT" link, so that the generated file includes only the files in the selected format.
Thanks for considering the idea!