If you have customized the extension then please take back up of your customized extension as such latest package will not contain the changes hence they will need to be done again.
Before installing the extension, please make sure to Backup your web directory and store database
Step 1: Download the latest file of your Magento 2 Extensions
Step 2: Unzip the package and upload into web root folder
Step 3: Run commands
php bin/magento setup:upgrade
php bin/magento setup:static-content:deploy
php bin/magento cache:clean