Flexible Survival

So. I know that updates are released according to the user status (Donator, free user and that) The thing is, I don't quite know how much time difference is between releases or how to identify which version I have currently.

Can someone please enlighten me on this?

The serial number shown at the start if a new game is the date of compilation backwards. So 140701 is 01.07.14

There usually is at least one update per week, free downloads are two weeks old.