I noted somewhere that Affinity Publisher cannot import .odt files, but they can accept .docx files and that LO can save as a .docx, which I did to my desktop. When I clicked to open the saved .docx file to see if formatting had transferred properly, the first thing that happened was that an OpenOffice dialog came up–please register. I was surprised, but discovered I had an ancient copy of OpenOffice on my computer, which I’ve never used.
Why did the attempted opening of the .docx file default to launching (a forgotten) OpenOffice app. when LibreOffice was open on my desktop and was the source of the .docx to begin with? What to do?