Bug Report : Fatal error before mailchimp API is activated

After updating this plugin (today) on two sites that have not had the mailchimp apt added yet, I cant now access their admin areas. (I cant now access via admin to update the API)

The error received is:

Fatal error: Uncaught exception 'Mailchimp_Error' with message 'You must provide a MailChimp API key' in /home/simplecs/public_html/italianeye/wp-content/plugins/mailchimp-sync/mailchimp-api/Mailchimp.php:226 Stack trace: #0 /home/simplecs/public_html/italianeye/wp-content/plugins/mailchimp-sync/helpers.php(36): Mailchimp->__construct(false, Array) #1 /home/simplecs/public_html/italianeye/wp-content/plugins/mailchimp-sync/admin_page.php(14): mailchimp_load_API() #2 /home/simplecs/public_html/italianeye/wp-content/plugins/mailchimp-sync/mailchimp-sync.php(88): WPMUDEV_MailChimp_Admin->__construct() #3 [internal function]: WPMUDEV_MailChimp_Sync->init('') #4 /home/simplecs/public_html/italianeye/wp-includes/plugin.php(470): call_user_func_array(Array, Array) #5 /home/simplecs/public_html/italianeye/wp-settings.php(352): do_action('init') #6 /home/simplecs/public_html/italianeye/wp-config.php(90): require_once('/home/simplecs/...') #7 /home/simplecs/public_html/italianeye/wp-load.php(29): require_once('/home/simplecs/...') # in /home/simplecs/public_html/italianeye/wp-content/plugins/mailchimp-sync/mailchimp-api/Mailchimp.php on line 226

I will remove via FTP but this plugin needs an urgent fix.

Thanks
Chris