Using R2010a, it doesn't work for me. Clicking most of the buttons (such as the 1x, 2x ...) result in error messages, such as:
??? Reference to non-existent field 'start_pos'.
??? Reference to non-existent field 'images'.
To be more concrete, I can generate the latter error message by:
(1) running "sr_gui"
(2) clicking the "register images" button
I'm not sure if this is because another button needs to be clicked first; if that is the case, then maybe a useful warning message can be generated.