Libre office starts with large window

Just upgraded to 15.0 and now libre office starts with a window about screen size on a laptop. It used to open with a smaller window on 42.3 which was the size I had made the window on the previous use. How can I restore the previous behaviour?

Run fvwm over X11, no desktop system, no KDE or gnome

Mysteriously this as started working as it did. No idea why but issue closed