Try hitting the little downward triangle and select "Clear List". Then do that again and select "Choose Folder". Then once you have selected the new location that should be the default and or in the list of choices.
That's the procedure I tried and I tried it again just to be sure, and that didn't work. The next time I use import it defaults back to the default folder located on the desktop. The new location is listed in the drop down and I can choose it but that step has to be repeated, and sometimes forgotten, for each for import.