Never do anything directly on a live store. First setup and test on a development domain (i.e. “dev.url.com”).
Temporarily disable Magento cache
To avoid any possible issues with the installation we recommend disabling Magento cache before proceeding with the installation and re-enabling it once the install is complete.
Upload Acx CMS-Migration
Using your favorite FTP client, upload all files and folders to the root folder of your Magento installation.
For how to enable magento 2 module follow this link.
Thank you for reading this user manual! We'd be glad to help you if you have any question relating to this extension.