Marvelous Designer Support

Hi everyone,

Does anyone know why I am unable to download assets from the store, and import them into MD? I downloaded 10 topstitches this morning, navigated to the C: drive location and copied them over. They show up in MD, but they say "unknown file type", even though the extension is .sst (topstitch). It's really annoying me, I can't figure out how to use the assets made available to us.