Still playing around with, but would appear its not taking any notice of any changes to the cfg. for example I have a 737 sound addon which I purchased via Steam which sounds great and also comes with a panel which is called Mini Panel and basically lets you click it and you get that "Bing Bong chime" before announcements
If I totally delete that entry "pasted below" it still shows, (after restart FSX)
Window09=Mini Panel
[Window09]
position=6
size_mm=221,211
child_3d=1
background_color=0,0,0
ident=MINIPANEL
gauge00=B737_800!pfd_screen, 0, 0
gauge01=B737_800!pfd, 21,19,179,179