ON the task bar on Windows 7 OS, if you right click the programs pasted on the taskbar you get a list of most recent files opened by that program. This was working for all Windows programs i.e. Excel, Word, Visio and also Adobe. All of a sudden the most recent files won't appear for Adobe. It still works for Excel, Word, Visio etc., just won't work for Adobe. I can't find a place to reactivate that function.