Because the plugin is "fixed" manually, you cannot update it through the WordPress dashboard. Using an outdated migration tool can lead to database corruption or "stuck at 0%" import errors.
Sometimes the 512MB limit is actually a server restriction. You can often "fix" this yourself by editing your .htaccess or php.ini file to increase upload_max_filesize and post_max_size .
If you are looking for the "fixed" version because you need to move a large site without paying for the Unlimited Extension, consider these legitimate methods: