Why did aperture 3 delete all my photos
My girlfriend had Aperture 2 and recently purchased Aperture 3. When installing she somehow clicked "update library" or something (I'm not sure what she did exactly). Now when she opened up Aperture 3 there were NO PHOTOS OR PROJECTS. Nothing. Everything was gone. When trying to select a new Library, there are 2 options- Aperture Library and Aperture Librabry_OLD. Both of these say - 0 files, 0 versions.
No idea whats going on here. Why would Aperture delete all my photos when upgrading?
Any help would be greatly appreciated.
Thanks!
MacBook Pro, Mac OS X (10.7.5)