I have exactly the same problem. And, unfortunately, it's not the first time. It did the same on every update :/. Dose this mean that I have to re-download the game every time WG is making an update to the game?! It's getting frustrating already.... :/
Not to mention that every time this happens and I try to close the game, it blocks my whole PC. I have to log out and in again to the computer.
You really do a good job WG, but you should also fix your small problems, before releasing something to the public.