My students submitted an essay on the google doc external tool. When I click into the assignment there is not a "download submissions" button.  It is not there in the grade book either.  I noticed it is there for the assignments that they upload a picture but not for this essay assignment.  Is there something I did wrong while creating this assignment?  (This assignment was imported from a previous course).  Is there something I can do to change the current assignment so I can download all of the submissions?