I've just upgraded to Mathematica version 11.3 (from 8.0) under MacOS 10.11.5. I noticed that when I "Save Selection As..." or "Save Graphic As...", the pre-filled name is "Untitled" plus the appropriate extension. It used to be the name of the current notebook file plus the appropriate extension. I looked through the Options Inspector, but couldn't find an option that might produce the previous behavior, which I preferred.
Furthermore, I believe that the directory was pre-set to the directory containing the current notebook file. Now the last directory used is selected.
Is there a way to get the previous behavior back?
In chat, it was asked if "Untitled" appeared anywhere in the output of
Options[$FrontEnd]. It did not.