Change a normal shutter to a profile shutter via Modify Shutter Design
Convert a normal shutter into a profile shutter through the shutter settings instead of editing the panel geometry by hand.
To convert a normal shutter into a profile shutter, use the 'Shutter Design' option of the selected shutter (Shutter > Customize; 'Modify Shutter Design' when several shutters are selected) and switch it to the profile type rather than editing the panel geometry directly.
Editing the shutter design manually is the wrong approach; the change should be made through the shutter settings so the correct profile is applied.