Originally Posted by Zebruh
So will i be able to take a screenshot of for example, the main menu?
No, you have to have the app running.
However, it still may be possible with the right coding. I'm thinking, set up a timer to take a screenshot, then "exit" the app using the menu bug. Make sure the app's screen is black so you can't see it behind the menu, then wait for it to take the screenshot.
Since this tool doesn't support a timer or the menu bug (I presume), then that's not really going to happen.