MED works fine, the problems I have are in WED.
(In MED the function keys are F6, F7 and F8)
It looks like

Something else has come to my attention;
when I set in the script:
var video_screen=1; //1=full screen, 2=window
does not work anymore, it starts up in a window and I can only change it with Alt+Enter.
And when I use Camera Position (red line with red and green square) I noticed that the squares are reduced to dots.
I have reinstalled the whole program (that is 3D GameStudio) again, did not help.
Regards,
Frits