Home folder sorting by author name

[mst]

Hi, I have Koreader installed on a Clara HD and a smartphone and am trying to harmonize the look. For some reason, on the Clara, the home folder is organized by author and on the smartphone by book title. How do I set this to author folders, so it lists the names of the authors, starting with the one whose book was last uploaded to the device? I looked everywhere and can't remember how I initially set this up on the Clara.