Quote - Files made with a newer version of a program are rarely usable with old versions of the same program. That happens with pretty much all program and is a results of new features being ... new. The old verison doesn't know how to handle the new format. It's just a way of life. It's like trying to install an new model engine inside a old style chassis. The mount points, transmission and everything else don't match :)

I think you misunderstood me the files were made in DS3 and DS4 but 4.5 choked on them and manged to make them unusable even though I didn't allow it save them as a new file