Since Booster for WooCommerce plugin v3.0.0, free plugin version is no longer required to run the Plus version. Booster Plus updates can be done automatically from your Plugins page – same as with free plugins from wordpress.org (however you will need to enter your site key).
If you have Booster Plus below v3.0.0 installed, please follow these steps:
- Download new version’s zip file from your account page.
- Deactivate and delete old Booster Plus version (don’t worry your saved settings won’t disappear).
- Install new version’s zip.
If you have Booster Plus below v3.0.0, you can still use it with free plugin v3.2.4 or below (you can download any previous version from https://wordpress.org/plugins/woocommerce-jetpack/advanced/).