Feature - Save As HandyPaint Format (.hpf)
HandyPaint Format (.hpf) is a HandyPaint proprietary image file format. If you have saved your painting as hpf format file in HandyPaint, you can open it again in the next time for editing. All details of painting can be saved in hpf file, and can be restored in the next opening. Go to My Paints Dialog, you will see all your saved hpf image files before.
Following is a screenshot of My Paints in HandyPaint.