If Excel 2003 is open and I double click an xls file in Explorer, it opens in a new instance of Excel. Very annoying. I can work around it by dragging and dropping the new file onto an open Excel file, causing it to open in the same instance. But this is cumbersome compared to double clicking.
I have seen posts elsewhere (though couldn't find them here) suggesting running
Excel.exe \UnregServer
Excel.exe \RegServer
but this has not helped. In Options/View - Windows in Taskbar is unchecked
Maybe it is something to do with having had a trial 2007 installed which I have tried to remove but keeps wanting to reinstall. Have been using 2003 since it came out and have never experienced this before.
Suggestions on how to persuade Excel 2003 to only open a single instance will be much appreciated.
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