If there's movement in the scene then if you select HDR On or HDR Pro then you will get ghosting on flags etc. This is a limitation of the HDR process and not restricted to iSTAR.
So for outdoor scenes that are well lit and that have movement I recommend ISO 100 with HDR Off.
You may wish to take a single shot with exposure set to Indoors (even though you are outdoors). You can then post process in Photoshop if needed.