Here's what you need to do if you get the corrupt file msg or any other msgs when trying to use the new updates.
Click your patcher.exe located in the patcher folder. Then with that running click the update 1-2 file. As soon as you click it, you'll see it start to patch the client.
Do the same for 2-3 and 3-4.
To launch the game, you'll have to use the element.exe. At least that's what I had to do. The launcher.exe wasn't working for me.