Unfortunately, that is the case for this version. I haven't though about how I can add this back in the future, but I certainly don't want to use the treeview control.

A couple of reasons here. First, the out of the box treeview control just didn't work the way it needed to with the module (see forum module search). It isn't a bad control, but it needs some love. Another reason is a treeview control that lists so many forums (like on here) is far from user friendly.

On another note, I personally think its not a very good idea for an admin to set notifications for other users. Users should be forced to opt-in (technically, you are breaking SPAM compliance otherwise - in most situations). However, we have notification forums that allow this very thing to be done by module admin for situations where it is a requirement (I have used this before because I had to).