Well, I installed both downloads (it does say to install both). I've put Judy and Don in out of the picture, moved a chair in, put lights in, rendered, deleted lights and replaced them with other lights, rendered, added a plant, did a Firefly render...and so far, so good. I'm not seeing any problems so far. I was on the Internet and checking messages while doing the Firefly render and it rendered along without pausing, which is an improvement for me. This is a very rough trial and probably proves nothing, but so far so good for me.