Elxis CMS to WordPress migration process

Hi there,
I have to migrate data from Elxis to WordPress, the premium version of your plugin can do this?
I tried the migration with the plugin free version, but it return the following error:
===
Connected with success to the Joomla database
[ERROR] Your version of Joomla (probably 1.0) is not supported by this plugin. Please consider upgrading to the Premium version.
[ERROR] Your Joomla database contains several users. You need the Premium version to import them.
===
https://ww.wp.xz.cn/plugins/fg-joomla-to-wordpress/