Yes, I understand that you'd like to switch to a newer version because of the updates and fixes, but if you're running into a problem then a possible workaround is to finish the project with the version that works.
And to investigate the problem, we need to test your scene, there must be something special in it that causes the problem. In general, loading older scenes should work, we don't know of any problems currently.
So if you prefer to get your scene working with the latest Ornatrix version, you'll have to send it to us.
Also, which is your C4D version?
Ivan Kolev (Software Developer, EPHERE Inc.)
E-mail: ivan.kolev at ephere dot com
Discord: ikolev