Uh, sorry for the late reply.
Console mode has been removed for the time being, due to some issues. It’s on the backlog though, and should hopefully be reimplemented at some point. I’m not developing this app, so I can’t give you any hard facts. But an awful lot of work has been put into the development of console mode, so it won’t just be dropped. 🙂
Are you completely unable to use Magic Dosbox on your Shield TV right now? Or have found some sort of workaround at least?