How to keep the program updated version of the data on sqlite can be realized?

If you write data PListNSMutableDictionary * dict = [[NSMutableDictionary alloc] initWithContentsOfFile: @ "/ Sample.plist"];

Pointing / Sample.plist file

Would not it be time to update the program to overwrite?
Reply:
Program updates when content data is not overwritten, only the app will delete the data deleted!
Reply:
Yes, but make sqlite files on Documents directory. Other contents of the directory will be updated out