If you need to update Magento 2 Admin Email Notifications by Magefan, please follow the steps below. Note that the update instructions depend on the method Admin Email Notifications extension was installed with.

Update using composer (Method 1)

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

composer remove magefan/module-admin-notifications
composer require magefan/module-admin-notifications ^x.x.x
# 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

Update using FTP  (Method 2)

If the Admin Email Notifications module was installed via FTP (check if app/code/Magefan/AdminNotifications folder exists), then follow these commands:

1. Download the latest version of the Admin Email Notifications extension archive from magefan.com.

2. Extract archive.

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

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

magento 2 Extension Installation

4. 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