Good afternoon and thank you for posting on the Final Fantasy XIV Technical Support Forums.

When you were able to play today, how long do you think your were playing before it crashed again?

What exactly happened when you changed the compatibility mode? You mentioned it gave you a DirectX 11 crash?

If it's only with one character you can try deleting the files in the 'My Documents' folder (My Documents > My Games > Final Fantasy XIV), then restarting the game. This is where locally saved files are and there are some that only pertain to that character that may be potentially corrupted.

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