I bought SGP a few years ago and have kept up with the updates. I use a Nikon D7100 camera. I know that it used to connect to SGP. My main astronomy effort over the past few years has been visual, but I am now getting back into astrophotography. I can no longer connect my Nikon D7100 using the latest SGP. I know the Nikon is connected to the computer using the USB interface since I can see its icon. I remove both SD cards, set the Nikon to manual mode and manual focus, however when I try to select the Nikon D7100 the green Nikon light does not flash (indicating it is interfacing to something). When I try to take a picture SGP crashes. I tried looking at the help files and going through your forum but have not been able to solve the problem. I even tried uninstalling and reinstalling.