Ooops, sorry Kurka, I forgot. I was going to test the render to disk thing, but I forgot all about it. I just spent the last hour trying to reinstall, with no success, so I just ended up having to backup everything I wanted to keep and uninstall/reinstall. Lots of weird stuff going on in the process, but I made it successfully back to the good ol' 4.03-02 version, at least. Gonna try the incremental update now...