I checked both the auto-update and manual patch, no problem found.
Please remember not to use gc12.exe to enter the game, use 12haup.exe instead.
If you still cannot login the game, try re-install the client and run 12haup.exe to update again.
A brain has two parts: the left part and the right part. My left brain has nothing right, while my right brain has nothing left.
"spent a day downloading a new client"
Downloading new client just takes 25-35 minutes. Updating all the paths just takes less than 1 hour. If you spend a day so it means you net so bad. In that case the client you downloaded would be crashed or doomed. And simply when you installed it the game wouldn't work correctly.