SW on Mac cannot open

I am downloading DS DRM-free from the Humble Store. RoG works perfectly, however when I try to add SW it refuses to load. It sends me to the attached screenshot. If I rename the DLC0002 file, it 'redownloads' the DLC in the updater, but the game loads normally, the new DLC0002 file is missing some things, and SW is not truly installed. The version number is 205747, which I believe is higher than the current version.