Fixed window widths in many of your Actions windows means that the edit boxes are also fixed widths. Often, my text value entry is much wider than the edit boxes. This UI design, in my opinion, makes these FinalBuilder windows feel amateurish and restricting.
If you allow for resizing the window and lengthen the edit boxes with the resize, then that would solve this UI problem and make FinalBuilder nearly perfect. Also, if you implement this design, then I recommend that you save the window widths for use next time they are displayed.