My users find Windows 10 takes 10 seconds or more to save a 9Mb stack with app compiled under 8.1.x, Mac and Linux save in a fraction of a second. Very annoying as the app freezes while saving. $@%?$@%?$@%?$@%?$@%?$@%? Neville Smythe IGF Director (Oceania) VicePresident, Australian Go Association Sent from my iPad