I bought this greenhouse yesterday and installed it. I wonder if I got the new version or the old version? I guess the only way to find out is to try for some weather and see what happens. I really do not want to uninstall it, though, because I went to a lot of trouble last night to stock it with all perfect plants, which was not easy feat!
Also, since it doesn't seem to allow you to plant on community lots still (annoying), I had to recatagorize it as residential, move my master gardner in and plant all the perfect plants, then move her back out and change it back to a community lot. I noted it when I changed it to residential, it said some objects were only allowable for community lots and would be replaced. Any idea what those were? I didn't see much noticeable missing when I went back in.
Just thought I'd come back and edit this post to say when I tried the game last night, it looks like I do have the new version, because rain/snow didn't go in, and I didn't even have the arches (to be removed) as noted in the instructions on how to fix the problem. So that's a relief!