Thank you for replying.
The direct chat has no key binding as such but in the key binding section it is unchecked (top left corner).
I have deleted the folder as you suggested and we'll see how that goes.
I should also add that it only affects the first log in of the day - if I log out and back in again then it's fine. So if I log in an alt then my main it only affects the alt.
It happens every single day I log in and it's sending me up the bloody wall.