Coursepress Pro Deleting Units

We are having an awful time with this plugin. The largest problem:
When we make a change to a course unit, it is deleted after saving and viewing. We have built and rebuilt units thinking we are doing something wrong. However, researching online has led me to believe that this is a CoursePress problem that is universal. 1. How do we recover our latest lost files? 2. Is there anyway to avoid this or is it a deficiency in the program that cannot be fixed?