If you already had the Genesis Framework installed on your site prior to purchasing the Willow theme, please make sure it is updated to version 3.0+, BEFORE uploading Willow. The Willow theme utilizes new Genesis features added in Genesis 3.0.
In your WordPress dashboard, go to Appearance > Themes. At the top, click “Add New,” and then click “Upload Theme” on the next page.
Click Choose File. Locate the willow-theme.zip file that came with your theme and upload it.
Click Install Now and wait for the theme to install. Activate the theme.