Changing Icons (Single File)

I have tried to change the lectora icon to my personal icon but get an error that says "image must be 16x16x16 or 32x32x32." I have saved the image as an .ico file at 32 dpi. Does anyone know why this does not work?I have tried to change the lectora icon to my personal icon but get an error that says "image must be 16x16x16 or 32x32x32." I have saved the image as an .ico file at 32 dpi. Does anyone know why this does not work?

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