You can tell Screenshot Captor itself to open after each capture, where you can see your image in a large view and do things with it, etc.
If instead what you really want is for Screenshot Captor to stay completely minimized and open a different program with each screenshot after the screenshot has been taken, you could use this option:
But I'm open to the idea of adding an option that says to open the screenshot in the default viewer after each capture if that's something people want.