Thank you for your answer. You are right, but I do not know how to change my export questions form Examview in order that Moodle do not change Short Answer into Essay questions. I export my questions into Blackboard Format. Do you know a better way to export from examview into Moodle?
And it seems that there is no way to edit an essay question and change it into short Ánswer. The only way I've found is to make a new questions manually.