Austropa Interconvention on "[Plugin: Email Before Download] Error [contact-form 404 "Not Found"]"

Thanks for your prompt reply.
We've updated CF7 to version 3.4.2
Unfortunately this version is not running on our current Wordpress version 3.0.3 but requires a minimum of WP 3.5
We'll see if we will also update our whole WP as we are not sure which effects such an update will have on all our other plugins ...