"I would like to get rid of the stray stitches in the background of my PhotoStitch embroidery."
It is best to clean the background of a picture so that there are no flecks, as they can cause stray stitches. If some remain in a saved PhotoStitch embroidery, remove them in the Modify tab or open the file in mySewnet™ Stitch Editor and use the following instructions.
Use one of the Select features to select the stray stitches.
Click Delete Stitches.
Save the adjusted embroidery.