I have version 3.8
Just tried to re-download and activate it and this is the error I received today:
“Plugin could not be activated because it triggered a fatal error.”
Warning: include_once(/nas/content/live/bizconectworld/wp-content/plugins/nm-wp-member-registration-pro/lib/mailchimp/vendor/autoload.php): failed to open stream: No such file or directory in /nas/content/live/bizconectworld/wp-content/plugins/nm-wp-member-registration-pro 2/classes/plugin.class.php on line 13