Make sure you already have Genesis theme installed.
- Go to your blog Dashboard – Appearance – Themes.
- Upload the second zip file (hollandbyskyandstars.zip) and activate it.
- At this point, you already have your new theme installed.
You will see that your website looks messy. It is normal and it happens because of the widget arrangement from your previous theme. You can re-arrange/edit your widget by following this tutorial step by step.