Try this. Right click the file explorer icon. This will produce another window. Right click "File Explorer", which you will now see there, and select "properties"
delete everything you see in the line "target"
Insert, instead C:\ Apply
Now see if the bar is as you want it.
Just had another read of your post. This bit "I didn't have this line before " jumped out.
Now I am thinking that the line has always been there, but your nephew has moved it?
Try clicking the arrow, as in my picture, and move the line to the top. That maybe what you had before?