If you wish, to show only the "Customize" button on your product pages and remove the "Add to Cart" button, please follow these steps:
- go to your WP admin panel
- select WooCommerce
- go to Settings
- then Integration
- select Zakeke
- click on Force Product Configuration
On the contrary, if you wish to show both the "Add to Cart" button and the "Customize" button you need to uncheck the option "Force Product Configuration"