Error after pugin deactivation

This was deactivated http://wordpress.org/extend/plugins/contact-form-7-sms-addon/

Now nothing on the back-end works.

Fatal error: Call to undefined function wpcf7_add_tag_generator() in /home/atlasspo/public_html/wp-content/plugins/minimum-length-for-contact-form-7/wpcf7_min_text.php on line 176

I will also post on the dev site... but this has not been answered.