Content loss in CoursePress Pro

Hi all,
We've recently discovered a major issue with our LMS site running CoursePress Pro, all of our course content has disappeared. The course details are still there, as are the assigned instructors and all the students. The side bar still indicates how many ungraded questions there are. However when you access the course there are zero (0) units created for the course and zero (0) units published.
We've had CoursePress as our primary LMS for 2 years now and we've lost all the course content and trainee responses from that time.
Any advice?
We're in a slow period of our course work and unfortunately the last time we can guarantee the site was working was the 2nd of September and we only noticed the error on the 23rd.
Chris