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

Update using composer (Method 1)

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

composer remove magefan/module-amp-blog
composer require magefan/module-amp-blog ^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 AMP Blog module was installed via FTP (check if app/code/Magefan/AmpBlog folder exists), then follow these commands:

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

2. Extract archive.

3. Make the backup copy of the app/code/Magefan/AmpBlog 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