You need a slight modification to your code if you are packaging as an app. You need to make sure that the main fuction which you package returns a figure handle so that the app removes itself from the path when you close it.
Is it possible to add elements to grids horizontally and not vertically?
Also, using the profiler i see alot of calls to the redraw function. Cant you skip the redraw in certain cases (when the object is not visible)
Thanks a lot for this toolbox,
Using version 1.17 in matlab R2013b, I came across some display issue with CardPanel object. Axes within cards are not refreshed correctly when switching from one card to another and both drawnow or resizing the figure do not help. You may read further details and find simple test case on stackoverflow: http://stackoverflow.com/q/25727765/684399
PS: This toolbox is extremely useful for designing appealing interfaces.