[Client doesn't open]

https://mega.nz/#!sNdywSCB!4WSrZyKZCZSA3sbAkHRxIUAgXQUBuxGX2UkEF1mVKo8

If you experience this problem, this is an older client that will allow you to play until the issue is resolved. Simply place the client in your nin online bin folder, right click the client.exe and run as administrator.

Sidenote: Running the launcher may replace this, breaking your client again. So be sure to run the client.exe itself as stated above.

Edit: If the client above doesn't work, you can try the entire bin folder as this helped one person already.

https://mega.nz/#!8ZlkXSDS!lVUuaY7auUu9tkrl-Nk8JRTZhjnhLC7701-1ZDsUmP0

To transfer your client settings / keybinds, copy the config.ini in your original bin/data files into this one. 

[Client doesn't open]

After the most recent update, the client simply shows the logo and does not open. It appears in task manager but the window is not visible nor on the task bar.

@Ueda