After uninstall this add-in, why the multiple word documents I open could not display in each window but still in the same window?
For Microsoft Office2003: Click Tool menu in the menu bar >> Option >> View, and then check "A window in the task bar" item
For Microsoft Office2007: Click Office menu >> Word Options >> Advance, and check "Show all windows in the taskbars" item in the Display term , and then click OK button.