HELP REGARDING SCREENSHOTS ADDED.

I wasn't sure where to put this, so I apologise if it is in the wrong place.
as some of you know, I've uploaded a demo of my latest project Steel Spirit SaGa, When you search for the game on the main part of the website, the thumbnail is a screenshot of the world map, I want to change that thumbnail to a screenshot of the title screen, but I have no idea how to do this, any and all help will be greatly appreciated.

(Also, I apologise if this is worded terribly, I've been racking my brains for ages now thinking on how to word this.)

nevermind... I sorted it now -_- I'm sorry.