Image cropper addon circle viewport type shows square

[ac.giesbrecht (Adrian Giesbrecht)]

Hi,

Image cropper even if set to ViewportType = circle launches square.
Anybody had this experience with this addon?

ImgCropServerComponent.ViewPort viewPort =
            new ImgCropServerComponent.ViewPort(150, 150,
                    ImgCropServerComponent.ViewPortType.circle);