I have backups of older versions of that file from 2011. I haven't backed it up since then.
Those older backup files on FTM are much smaller since I did most of my ancestry work within the last year.
Cliff: I have followed all the directions on that link you provided alread. I'm on the phone with Ancestry now to see if I can pay someone to open the file as it would take way too long to manually re-enter all the info.