can you create subfolders for your main site on your server using this dialogue box? Using the Sub-Folder optional input?
Yes, just type in the sub-folder section something like /public_html/goose-attacks-mayor/ At the bottom left of this publish window is an 'Explore Web Space'. If there is no such sub-folder on your server Xara will ask if you wish to create one. Hit yes and it will show you the sub-folder (empty at present because you've not published yet) Then publish.