Launcher crashes when clicking Login

After entering credentials, click play. Launcher fatally crashes and displays the following error:

Problem signature:
Problem Event Name: BEX
Application Name: ffxivlauncher.exe
Application Version: 1.0.0.0
Application Timestamp: 522527fd
Fault Module Name: ffxivlauncher.exe
Fault Module Version: 1.0.0.0
Fault Module Timestamp: 522527fd
Exception Offset: 00085a65
Exception Code: c0000417
Exception Data: 00000000
OS Version: 6.1.7600.2.0.0.256.48
Locale ID: 1033
Additional Information 1: 6f8b
Additional Information 2: 6f8b118dc616df8b9170ecef75fc6888
Additional Information 3: 85dd
Additional Information 4: 85dd727c6ba504c37e7995a931c434c5



Logged on fine yesterday. No hardware or software changes. Unable to login today. Anyone else with this problem and/or a fix?

You could try reinstalling DirectX. Often that fixes many launcher problems.