Main Menue Buttons not responding

I entered SR2 0.3.1.1.0 for the first time, and when I tested the rocket, I was on Smoon. So far, everything was normal. I wanted to go to Smearth's launchpad and went to the main menu. I tried seelcting the location, but nothing happened when I pressed the "select location" button. I tried all other buttons, but the only button that triggered an event was the 3 small lines on top that open the 3 other buttons (New Game)/Load Game/Exit. Even the "Exit Button did not work. I closed the window and re-opened the game, and from there, everything worked fine, even when I left the map and changed it.