Currently in Fusion 360, to select a folder to save a file you, you are required to double click it to open the folder. I have found this really confusing when I don't pay attention, because my intuition is to single click, which highlights the folder. Clicking save, however, puts the file in the master folder, not the one I selected. I see no reason for a highlighted folder not to indicate a file is being saved there, and this wouldn't impact anyone who is used to double clicking to select a folder.