simulatorplay

Hello, I have a problem, I recently installed the newest version of MP, at the end when I say to lunch, it gives me the options and below it says "don't ask again", so I selected Play the game with Open GL and I also selected don't ask again. Then once the game opened, I'm like "I screwed up." So I reinstalled MP, never gave me the start up screen. The I totally uninstalled MP and same thing, no startup screen. So how can I change it back to the regular "Play ETS2MP setting?" After all that my game has been acting strange. 0