Hello, Isotto,
We’ve activated the XStore theme on your site.
Please check and let us know if you require any additional assistance.
To add a header on the site, please go to Theme Options > Header Builder > Header templates > Ready To Go Headers. It is not recommended to import a few templates, so select the desired header from our demos first.
You can install a full demo version or just particular elements from demos, via XStore > Import demos.
The import will not delete your content, but new pages, menus, static blocks, products and so on will be added in the result of the import.
Before the import, create a backup of your site to be able to restore it in case something goes wrong. Your hosting provider can help you with the backup.
Kind Regards,
8theme team