Before, when I first opened the Windows Explorer, it always appeared in its full size, occupying the entire screen, like other Windows apps, e.g. Word, IE etc. But since a couple of days ago, it suddenly started opening in reduced size, occupying only part of the screen. Of course, I can increase it to full by clicking on the square icon on top right, but this is annoying. Is there a way to restore WE as it was and should be, i.e. open directly in full screen size?