No : Settings: http://i.imgur.com/ZlhLA.png http://i.imgur.com/qR3nm.png data after the program starts. data has changed, a new date on the files. http://i.imgur.com/RgnYc.png I open the program again, it shows that nothing has survived. Do not close the program look at the data files - they are old...

Why does function "write if not present" overwrite existing files, thus not allow the program to save the data?