Ignorance talking here. Perhaps Xara and other applications create a placemarker file without an extension and no content first up to "reserve" the filename ahead of a land-grab by anything else. The application then added the extension and content and finally deleting the zero-sized placemarker. In doing it this way around, Quick Access knows of the first empty file but the copy, file extension and filling of the correct file is possibly all low-level DOS/PowerShell commands that do not interact with the Quick Access rendering mechanism.

As we cannot readily change MS, though I did once, it might be possible for Xara to review its Export mechanism to see if the above has a germ of truth.

Acorn