if you pull the plastic housing off where the controls are to open and close the roof/blind, there is a handle to wind it open or shut.
Try the reset and it might get it working:
1 turn the rotary selector knob to position '0' (fully closed)
2 keep the rotary selector pressed (for longer than 2 secs): the roof closes
3 wait, keeping the roof completely closed until the blind has clicked shut twice (Hard closing position and then returns to the Soft closing position)
4 release the selector and press it again within 3 secs.
5 keep the selector pressed until the roof (glass and blind) is completely open and then closed again
6 release the selector;
There is loads of threads on here, hope its as straight forward as a reset.