I have indeed made daily backups of my Tree files, both FTM2012 and FTM2014Beta
The way FTM 2012 launches first the usual whirly thing appears, followed by the splash screen while it initializes, then the frame shows up followed lastly by the data. In my case FTM 2012 does not get past the whirly thing even after reinstallation so I have no way to work with my original or backup files - which still exist. Meanwhile FTM 2014 Beta and it's discussion group no longer work as they seemed to have timed out. So ... stuck in "no mans land".
Sorry for all the concern. I am not a professional IT person ... just a Beta end-user volunteer hoping to get some help with getting my FTM 2012 to work again.