Here we go. Remember, in order to see all scenes some choices have to be made in Alex part. I will post a walkthrough later when ordinary release will be.
But to give you some hits… You must have the outfit before David part. So for that you need to take Tasha out, and check the online shop and inform father about the outfit during the shop scene. He has to be aware what this outfit for also.
Old saves will work. But the choices have to be made anyway. So make sure that you made those choices in your old saves. Otherwise, play from the start.
I think you will figure it out the rest.
In the version 0.3.1 graphical bug is fixed (New picture of Tasha). Otherwise it is no different from 0.3