Download the zip file of the Hello Shoppable Theme from WordPress Directory. Follow the following steps
Dashboard > Appearance > Themes > Add New > Upload Theme
You can directly search from the theme section in wordpress.org. Once you download then upload and activate the theme.
Getting Pro Plugin Zip File
After purchasing from the Pricing page, you can download the zip file for Shoppable Pro plugin. As Shoppable Pro is a plugin it is installed from the plugin installation page. Follow the following steps.
Dashboard > Plugins > Add New Plugin > Upload Plugin.
Now you can activate Shoppable Pro.