If you need to update Magento 2 Translation Extension by Magefan, please follow the steps below.

Note: the updating instructions depend on the method the Translation extension was installed with.

Update using composer

If the translation module was installed via the composer (check if vendor/magefan/module-translation folder exists), then you need to run these simple CLI commands in Magento 2 directory:

composer remove magefan/module-NAME
composer require magefan/module-NAME ^x.x.x
# replace NAME with:
# translation - for translation extension
# translation-plus - for translation plus extension
# replace x.x.x with the version you want to use
php bin/magento setup:upgrade
php bin/magento setup:di:compile
php bin/magento setup:static-content:deploy

If you want to upgrade to Plus, check this guide on how to upgrade Translation extension plan.

Update using archive and FTP

If the translation module was installed via FTP (check if app/code/Magefan/Translation folder exists), then follow these commands:

1. Download the latest version of the translation extension archive from magefan.com.

2. Extract archive.

3. Make the backup copy of the app/code/Magefan/Translation or app/code/Magefan/TranslationPlus folder on your server and then remove it.

4. Using FTP, copy app folder from the archive to your Magento 2 Directory. 

Update Magento 2 extension via FTP

5. Run update CLI commands in Magento 2 directory:

php bin/magento setup:upgrade
php bin/magento setup:di:compile
php bin/magento setup:static-content:deploy

Note: if you don't want your website to be down during deployment, try these zero downtime deployment commands for Magento 2.