Cannot save photos sent from iPhone as jpg on our hard drive. Have done this for ten years until yesterday.

As a twelve or more years user of Thunderbird, I find it to be okay most of the time. I hate the spam folder that does not learn and I hate threads. Today all of a sudden, I cannot save photos sent from my iPhone as jpg. I have always right clicked and a menu has appeared. Today, the right click just zooms in which I never want to do when I am trying to save. I tried searchig online first before coming here. Apple is claiming that Thunderbird developers made a mistake and that is why the right click is not working. AI had me try a bunch of different techniques none of which worked. When I do save after much effort, the "photo" in my Animals folder appears as the Thunderbird logo instead of the real item itself. The other weird thing is that my folders also do NOT show up where they should when I am trying to save. The menu doesn't give me all the folders as it always has. Instead it just say All Files which is not adequate.