The ProPresenter Information Center is the first screen you will see when ProPresenter opens. It contains several actions and links to help you get started. You can close the window by clicking the "X" in the circle on the upper left to get to the main interface of ProPresenter.
You can always get back to the Information Center by clicking View in the menubar and then selecting Info Center. To prevent the Information Center from opening every time uncheck the Show at Startup box at the bottom of the screen.