I think a nice feature would be to remember the way you sort the object bar.
This way, every time you open your .cap you don't have to change it to "sort by A-Z" every time.
Also it might good if your file remembered what layer was selected when you last saved the .cap. This way when you open up your program it remembers what layer was selected and you can just continue working. (sometimes I forget to change the layer as soon I open up the .cap, which leads me to creating objects on the wrong layer)