Course Units disappeared on update

Hello, I updated to the latest version of CoursePress last night. When my users logged in this morning, many of them were missing Units previously created on courses. If I go into phpmyadmin, I can see the Units they created (I think they are all there). This is not an issue on all the courses. It seems as if there may be a relationship as to whether the course was marked as “live” or not before the update. Please help!