I'm going to have to dig a little deeper on this one so I can get you the right files. I agree, the documentation is a bit unclear.
From what I can tell, you'll need to update first to v6.2.2b156, then to something like v7.4.4b9, before going to v7.8.4b1-patch1-4 (the last version available).
I provided some information in
this thread, but after further review, it may be incorrect. I've removed the file linked there while I check. I'll update this post and that one when I figure out what's going on.