data.bin - file with data for initial NN learning
(you can convert it to ASCII with "converter", to see how it looks like)
elements.bin - database with user elements, and user learning process
(every element here remembers data about own interval, next repetition, etc.)
queue.txt - file with new elements, not yet in learning process
user_data.bin - file with data for NN learnt from particular user
weights.bin - saved NN weights