Board Thread:Help!/@comment-26523509-20150926143754

For some random reason N Terraria stopped working and every time I try it says "Please launch the game from your Steam Client" even though I've been doing it the same way for weeks...All of the sudden it stops working. I have tried to re-install once, But now when Game Launcher opens a CMD box pops up and says "What do you seek? 1 = Game, 2 = Server" I type in 1 and N Terraria opens but the Steam message opens and closes it, Any one know why this is happening? :c  