I upgraded my Windows 10 on 23-9-16. now when I open Excel 2010 the default display is changed. When Excel was opened previously the 'Home' tab was expanded and the various groups are visible. Similarly when any other tab is clicked the groups are automatically exposed. Now when I open Excel only the tabs are seen. If I click on a tab it expands the heading to show groups but disappears when you move back to the worksheet. How do I go back to always show the expanded groups?