Texture-Pack Crash

I Recenty Downloaded A texturepack. when i tried to activate the resourspack the game completely crashed. when i restart de launcher it just keep crashing over and over again. it says that my game is modded but i didnt activate a mod at all. i tried to repair the game and also downloadiing it again. but it keeps saying de error that i have a modded version witch isnt true.after deleting my texturepack it stil gives the error and it still keps crashing. is there a possibility to remove my probably still sellected texturepack. or something else. Blesses Casper From The Netherlands