My son has been working on a project in Pro/Desktop which is now corrupt

Hi Everyone

My son has been working on his GCSE project for a while and now it is reporting as corrupt so he cannot update and his school have told him he must start again! Can anyone suggest how this file might be repaired or another way to copy the data out to a new file to save him many many hours trying to complete his GCSE project

Thanks in advance for any help that this forum may be able to offer

Dave

(The Dad of a very stressed lad)