The same is happening to me, and Im around 5 hours with the same error.
The OP didn't report an error, just that, by his description, the patching process seemed to be working as it should.
In your case, check the game version number in the lower right corner of the game launcher window. The current (as of today) version is 4.0.8.2489en.
If your game is stuck at a version number well below that, it's safe to close the launcher and restart it, so it can continue patching.