Francis, Looking at your screenshot again, it appears that your camera is not actually connected even though SGP says it is. You are showing no Temperature for example. Here is a screenshot of my windows drivers for the H694. What are yours showing?
I can't remember what versions/models were offered in the drivers when I installed them (it was a while ago) but I seem to remember the H694 was one of the options listed. I also selected Loadstar and Ultrastar under the Guide camera options so on the camera dropdown in Sequencer I can see all three cameras listed - if this helps.