I'd just like to do a +1 on ffdltd's request to keep version 2's back-end upgrade page as an option. With Aaron's answer, I understand the front-end page was highly requested, but I think you can't force legacy site owners to choose between keeping their back-end upgrade process because it makes sense like this and benefiting from the plugin upgrade with its fancy new features. I don't say that because I'm in this situation (I'm not) but because it makes sense for me as well to have this process in the back-end.
What I don't understand though is the issue with SSL certificate for CC payment in the back-end. Is there really no way to do it?