E-Sword 11 now uses HTML for it's modules.
From BibleSupport.com
E-Sword modules are now HTML-based! This change will allow many new and unique resources to be created for e-Sword. Don't worry, e-Sword will still work with the older RTF-based modules as well. Most of the [official] resources have been updated to this new format, so you may want to download the updated versions of these modules, especially the non-English Bibles as they now contain the actual Unicode characters which makes for better search results.