Maxscript - removing quadmenu item

i seek help with pesky exporter option: some dll injects itself into quad menu, i cant remove it permanently from quadmenu (it returns there every tim ei restart max), and i can remove it only using customise -> customise user interface dialog, but doing it every time is tidious.

Its from babylon exporter:

I've tried using

quadMenu=menuMan.getViewportRightClickMenu #nonePressed
menu=quadMenu.getMenu 4
menu.removeItembyposition 1

but it doesnt work, probably i've messed up something with maxscript.
If anyone can help me with this, i'd be really glad.

Adam L.