Docker Buttons/Icons Missing on X6

I have upgraded my laptop to Windows 10. Now my dockers in X6 are missing the buttons/icons. I can hover the mouse pointer and the popup opens and shows the name of the item I'm hovering over (but can't see). I've tried pressing F8 to reset the workspace and this has not helped. Does anyone know how to make them re-appear? If I upgrade to X7 will that fix the problem?