delete the "AF3-Project_Directory" in Storage Navigator lead to defect of creating new project
If man deletes the “AF3-Project_Directory” in Storage Navigator heedless, new project can not be created any more, and man can also not create a new Project called “AF3-Project_Directory” in Storage Navigator to repair it.
(from redmine: issue id 1027, created on 2012-11-07, closed on 2015-05-21)