We are also exploring use of the Texture Desktop Editor to create XML files and upload them to the Texture Editor in OJS and have run into the same problem with the .dar file. If there is a way to extract the XML files from the .dar file or for the Texture Editor Plugin for OJS to accept a .dar file, that would be very helpful. Is extracting the files form .dar after being saved from the Desktop Texture Editor the only way to ultimately get the files to work in the OJS plugin?