save data recovery

Hi, I have a problem with my NFS Unbound save file. I played the game on my girlfriend’s computer, and it only loaded an old save file from about 6 months ago (the last time the game was played on her PC). I continued playing with that progress. But now, when I open the game on my own computer, my previous save is gone, and it only loads the same 6-month-old progress. How can I recover my original save file? Any help would be appreciated.