Thank you all for the responses to my query. I have already downloaded it and will be installing it today. With all the bug fixes it should work a lot better than my current version, which crashes when I use the bridge to Bryce 7 Pro for moving certain large object files. I hope this bug has been addressed and fixed, because when I export my objects as .obj and import them into Bryce, there is a lot of materials a textures files that have to be manually loaded to get everything I want in. Tedious.

Unfortunately, I have no version of Carrara at all, which I have heard is a fantastic 3D art software program. Still I have several already that serve me quite well for now. 

I will look in on the discussion thread for 4.5, and see what is being said about it. Thanks for the heads up.