Thank you for the reply Eadric.

To change the DirectX version, click 'Config' on the Final Fantasy XIV launcher. There you will see and option for DirectX 11. Turn it to 'OFF' and it will change it to DirectX 9 mode when you start the game.

Were you able to try updating the graphics card drivers?

You may also want to try a clean boot. Simply open the task manager and select the 'Start up' Tab. Disable everything here and restart the PC.

We hope we can be of assistance in helping you enjoy the exciting world of Final Fantasy XIV!