The xml file is probably located in a separate folder within your theme folder. If you are having issues have a look at the StudioPress documentation or ask for help in the StudioPress support forum here: http://www.studiopress.com/support/ They will help you out.
Thank you. Yes, I’ve looked in the theme folder for an xml file for the demo site and it’s definitely not there. In the meantime I’m populating the site the normal way and it seems to be working so far.
The XML file is the the WordPress data export file, and has absolutely nothing to do with your Theme (unless it includes custom-post-types or taxonomies registered by the Theme).
The WordPress import/export file includes data stored in the database, such as Posts, Attachments, Comments, Pages, Categories, Tags, etc.
To develop (or modify) a WordPress Theme, you don’t have to have anything more than a default WordPress installation, and an installed Theme.
You’ll probably have more luck with the Studio Press forums, but I believe the XML file comes in the child theme folder, not the Genesis folder. If you look there, you should find it.
Then you can follow these instructions to import the sample data into your WordPress install.
Thanks for your help but honestly I don’t see any xml files anywhere in child folder or Genesis. I’ve looked for a WordPress data export file and don’t see that either. I’m doing the site the old fashioned way, though I have to say Studio Press tuts and videos barely scratch the surface. They should take a leaf from Elegant Themes who at least include helpful info for people who aren’t php savvy.