Quote - Bob, I'm running 4.5 as well. I have no issues creating scenes in 4.0 and loading them in 4.5, resaving as DUF and reloading.

By the way, it is really not recommended to run two different versions of DS, e.g. 4.0 and 4.5. It can be done, but there can be problems. As soon as Reality is available for 4.5, I'll be getting rid of 4.0

 

Thanks Anton thats good to know you liking 4.5 by the sounds of things have you for the heck of it ran a 3Delight render ? Just curious if you seen fater times...

Did you simply install 4.5 followed by the new content?