@ShynnSup There is no reason why you shouldn't be using v7 Hotfix 2. It is a stable release and fixes and add many features. If nothing else, you can always go back as long as you have the installer or re-download it somewhere.
If you still have a previous version of C4D installed, you can tell the v7 installer to only install on that version. Then open you scene in the old C4D and test it that way. I always keep r19 on my system since there are many older 3D models and even some of my old files that will not open in r20 and newer.