The inVogue theme allows for two options when importing demo content, both options are accessed from the Apperance → inVogue Settings → Demos tab.
Demo Page Install
This option allows for populating individual pages with premade demo layouts that you can see showcased on the theme demo page. This option does not include any content, only the structure and page elements required to make the layout. You will need to make edits to these pages to include your own content (images, text etc).
When using this option you would first select the page on your website that you would like to apply the layout to and then select the name of the layout that you want to apply to your selected page. Layout names can be seen on the theme demo page.
When using the Demo Page Install feature, the current content on the page will be overwritten with the demo content. We recommended that you apply demo page content to newly created blank pages only.
Full Demo Install
The full demo install option is recommended for new WordPress installations without any pre-existing content. This option will create several demo pages along with a few demo posts and products. This option also includes several demo images which are applied to the posts and products. The images are intended only for demo purposes so cannot be re-used and should be replaced.
This option will not import content if any already exists on your website i.e. if you have already published any new pages, posts or products this import will not work, you would need to first delete any existing content.