@Mili:
Moreover, how do you update a file inside an archive by adding a file to that file?
You could do that with almost any file, but I mainly do it with a PDF portfolio. With a PDF portfolio, you can just drag a file into it. If I am NOT dragging it from another encrypted archive PA correctly asks if I want the FILE within the 2nd Archive updated.
Seems as if (a) I cannot explain this clearly enough, and (b) it probably cannot do what I want done, so I will stick with the workaround. Sorry for the bother.