1. Download the theme
After your purchase, the Odoo Apps Store gives you a download link. Download the ZIP file to your computer.
2. Copy it to your Odoo server
Extract the ZIP file, then copy the content of the Modules folder into your addons path.
3. Update the apps list
In the Apps menu, click Update Apps List so that Odoo finds the new modules.
4. Install the theme
Search for Butterfly in the Apps menu and click Install.
If something goes wrong
If the theme does not show up, check that the folders are directly inside the addons path and that you updated the apps list. Also check that the version you downloaded matches your Odoo version.