Google is not supporting Recaptcha versie 1 since 31-3-2018 anymore. I have tried to change the settings necessary in the recaptchalib.php but now the captcha is not shown in the form anymore.
Please help me to correct this but even better provide an update for everyone

With kind regards,
Peter

Hello, thanks for using our extension!
I thinks the recaptcha lib file not changed from google, please check code.google.com/archive/p/recaptcha/downloads
So could you please try using new site key and secret key for V2 developers.google.com/recaptcha/docs/faq

Regards,
Kien