For no apparent reason , when a window opens in Windows , it no longer fills the whole screen ... it used to .... but now its half the size and I have to manually make it bigger each time I open a new window. How can I change this so it opens full screen every time ???
Open the window, double click the title bar to fill the screen, close the window using file > exit (or equivalent) then your window should be full screen the next time you open it.