updating coursepress pro losing work

Hello

Okay.. today I tried to update the site. Unfortunately teachers lost information after the update.. student work (non-assessable work) and well as unpublished units disappeared. Also, the assessment area was saying that there was unmarked work. But I checked these courses and all marks had been given. I restored everything and tried again. The wordpress update was fine.. but once I updated Coursepress the same thing happened. any suggestions as to how to solve this? BTW I restored everything again and will wait to hear from you before moving forward. thanks