Up until a few months ago, whenever I opened a worksheet and later wanted to
save it with a different name using "save as", it remembered the location of
the original file.

Now, it remembers the name of the last file I opened, I would prefer it the
old way, but don't know how to change it back.

Example, I open worksheet aa from folder AA, then open worksheet bb from
folder BB. I make some changes to aa and want to save it as aa1 in folder
AA, when I select "save as" it wants to save it in BB. I can navigate to AA
and save it there, but it was much easier when it remembered.

Is there a setting I may have changed inadvertently?