Still in Beta but should work as expected. Please see https://websitemigrationguides.com/guide.php?migrate=14 for full details.
This plugin is distributed in the hope that it will help you when upgrading moodle. It comes WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Do not leave this plugin on your hosting as it may be a security risk. Use it only to collect the required information and back up the plugin folders. As such treat this plugin as if it is open to security exploits.
Do not copy it to your new moodle install.
This plugin was created to function on a linux platform.
Please make sure that you have made a complete tested backup of your moodle site before proceeding.
This plugin was designed to help you when upgrading moodle. I can not guarantee everything will be correct or even if it will work so always check everything manually.
Always test this plugin on a copy of your moodle site (e.g. a non live version).
Big thank you to the moodle community on the forums for their help with this module.