I just tried it for the first time after watching Jason's tut.
I'm on Windows 7.
It is saving files but not to where I thought i specified. It's saving them to a similarly named location elsewhere on my drive.
Try doing a search on your drive for the first part of your file name and see what it finds.
I'm not sure if that is working right or not. Windows 7 is a bit confusing on where some standard folders actually reside. On the Mac i have no idea.
I would at least report the fact that you are getting two listings for Autosave in a new PRJ and submit a new PRJ that has that in it.
For now, delete one of the dual autosave blocks in the Text editor, resave under a new name and load that and see what shows up, and search to see if it is really saving something somewhere.