You don't need to be of more help! After several days of trying all-sorts without success, your 'steps' has done the trick. Thankyou.The sensor is in the door handle. Could it be that?
After having a flat battery I had the same problem that the window would not go back up -- not even using the button. However somehow after a couple of hours it went back to normal.
The only other thing that springs to mind is that sometimes after disconnecting the batter the windows will not "full shut" (second notch on the switch) and will only go up in steps. Putting them fully down and then going back up in steps lets it re-learn.
Sorry I can't be more help.