After I finally got it to update I played for about 40min. then I had to get off. After I come back to play I open the launcher and it starts updating the thing again. Does it have to update every time I play? Or did I not get something?

Ok, I just downloaded the launcher and I log in. Everything is fine up till here. It starts updating, then after a couple of minutes it stops. I click on play and it says the file wasn't found. I've done everything I know how to do and it still won't work. I tried using 7zip and I click...