Starting in Version 2.20.0 you can now have Screenshot Captor display a quick PopUp Dialog after you perform a screenshot:
This resizable dialog will let you quickly preview screenshots and decide whether to save, discard, print, perform clipboard operations, and more without ever opening up the main Screenshot Captor Window.
You select to display the popup dialog either from the tray menu near top, or options dialog on the On Capture tab.
You can of course just hit the LETTER corresponding to your choice rather than using the mouse to click buttons.