The first time that you install Kronocard you are asked to select some categories. By default if you changed nothing the selected categories are, Baseball, Football, Basketball and Hockey.
If later you need to add more categories to your Kronocard here is how to do it.
Now you will see the category manager. There is a lots of option here but don't worry if your category is on the left the only thing you need to do is put a checkmark in the category you want to add and close the window by clicking the X at the top right corner and restart Kronocard. You don't need to change anything on the right for the moment.