I have been using office tabs for a while and love it. I use multiple spreadsheets at one time, and it is quite helpful to have them in one instance of excel. However, since "upgrading" to the 2010 version, I cannot get my spreadsheets to open in one instance of excel. I have clicked the "Display all windows in the taskbar" in both the Office Tabs options and the Excel advanced options boxes, but it still opens them in a new excel window when I double click from the folder box in Windows. Is there something I am missing? This is driving me crazy as I can have up to 5 spreadhseets open at a time, and moving back and forth between them is becoming very time consuming. Thanks for any help you can offer!