ATutor offers the facility to create backups of your course and restore the contents of those backups at any time. This is very useful for duplicating a course or saving the entire course for safe keeping in the case of accidental loss.
The Backups utility is found under the Manage section and is available to Instructors and Sysytem Administrators.
Each course can store only a finite number of backups (default 5). That limit can be altered by the Administrator using the System Preferences option.