Micrografx Icon

Micrografx Icon (ICN) is an icon format used by some Micrografx applications, such as Simply 3D.

Identification
At least some ICN files begin with ASCII " ".

Sample files

 * http://cd.textfiles.com/cdreview/cdreview67/SIMPLY3D/ → *.ICN
 * https://telparia.com/fileFormatSamples/image/micrografxIcon/