Great game . I saw that have a password in the "preference" 
It's for unlocking all chapters in chapter select, mostly for Android users who otherwise have to use skip mode to catch up to where they were (which can take hours now that the game is this long lol)
The password for that is "Vanguard"
I never lost my saves. I just copy to be sure I won't lost it and paste back on the new folder the last update created. If need.
Just copy the saves from the folder android/data/santa.lucia.