SGP suddenly has stopped detecting/noticing my Nikon D750. I know that the computer sees it because when I power it up the OS wants to recommend an App to download its content and when I use Backyard Nikon it works fine. I think even SGP notices it too because for a few seconds after pressing the connect button on SGP the busy light on the back of the camera blinks very rapidly. It then comes to a stop and a few seconds later SGP announces it could not connect to the camera.
Any idea what could be wrong?