Making exported Excel files editable immediately (not protected)

By default, the Excel file that results from CRM's export to Excel function is set to be non-editable; you have to open it and click on "Enable Editing" before it can be used, for example, for certain imports or mailmerges. I think I remember finding a way to set CRM or Excel so that the file is not protected, but I do not remember it again and a search does not turn it up for me. Can anyone help out? Thanks in advance!