Upgrading to a New Version
We strongly recommend using composer to install the Algolia extension for Magento. Instructions on the installation process can be found here. Unfortunately, updating the extension using other installation methods is not supported at this time.
Run composer’s update command to update the extension to the newest version.
$ composer update algolia/algoliasearch-magento-2
After updating the extension, the configuration should be saved again even if the settings weren’t changed. Navigate to Stores > Configuration > Algolia Search and hit save.
With the configuration saved, the indices of your Magento project should be reindexed according to these instructions.
Make sure you read the changelog for any additional steps that need to be taken.
Another option to upgrade your extension is through Magento’s extension manager in your store’s backoffice. You can find the manager by going to:
Stores > Tools > Web Setup Wizard > Extension Manager
Please read this Magento devdoc for more information on how to update your extension.