Yes, we do. You get a free upgrade for the theme for the same Odoo version. You can compare the changelog file with your installed theme version and download the latest version in case you're using the older version.
Moreover, if you want any feature which is not needed in even the latest theme version, feel free to contact us at our email: support@bizople.com
If you are looking to download the theme for different Odoo versions then please note that starting version 13, every version of the theme will be sold separately.