Thank you for the reply, Nik.
I think I figured it out. I know about the two types of windows one can use in Nitro. I just figured out that Nitro opens both types of windows when launched. The File System window was always on top, hiding the Photo Library window. I had missed this. Now I think I understand what’s going on.
Thanks for your help. So far I’m enjoying learning about Nitro.
Ed