As you can see the difference between 4.0 and 10.0 is huge plus you need to count the 4.0.X updates up to version 10. I believe you are facing a compatibility issue because the newly updated version does not fully understand the old format although it's from a prior version. Unless the company does not have a conversion tool, I believe you will need to use a version prior to 10.0 which has backward compatibility to 4.0.