Orion,

If it's a DSI colour model (not the Pro model) it's the same soft used for the LPI. In the top left of the imaging window you can adjust the exposure time.
Generally you need to shoot well under 1 second exposures. The DSI can react differently using exposure times under one second. In the way it writes the image info to the screen/file. This is why most folks have both, DSI for dso's and LPI for luna and planets. Hence the name

regards