Sorry, I may have explained incorrectly. Whichever post types are not choosen on the Search Sources -> Post Type search box, they will appear as unselected by default.
In you canse you only need to choose the Estudios post type, and the other one is going to be unchecked, like this: https://i.imgur.com/fsQWDwp.png
That will result in the exact output from your screenshot.
