One thing which I never liked was the behavior of CPT after you jump to a position for example which is marked as "ToDo". Then the move list was empty and you couldn`t navigate back anymore. To get back to the start position you had to click on the reset button.
While this behaviour is from a programming point of view somewhat logical it is not intuitiv for the user. People ask me about this from time to time and I have to explain to them why CPT is behaving like this. I came to the conclusion it is a bad design from the programmer (me 
).
Why is it the way it is in CPT 3.3? Well, if you jump to a position by some criteria like "marked as ToDo" or "position with more than one candidate move" CPT just queries the repertoire database and shows the next position which fits the criterias. However, CPT has no idea how to reach the position.
Behaviour change in CPT 4: In the next version such a situation doesn´t exist anymore. Where is always a move order for the current position. When you "jump" to a position CPT will recalculate the main line reaching this position and show this move order. In the case that due to some transpositions there could be more than one move order it will select the most top ranked candidate move. I believe this is much more user friendly.
In addition to this behavior the next new feature is a perfect match. In CPT 4 there is a "Previous move" window which shows all candidate moves leading to the current position. Sometimes more than one are leading to the same position and this list will show you which and to which (sub-)repertoire they belong. Now, if you click on one of those moves CPT will first check if the move is already in the current move list and if not it will recalculate the main line leading to that position as described above.
Now this gives you a totally new way to navigate through you repertoire. At the same time it makes CPT easier to grasp I believe.
I want to make CPT as intutive as possible. Any other issue in CPT 3.3 which you believe are not very intuitive and should be changed?
Regards,
Stefan