[Plugin: WP-reCAPTCHA] mh_insert_email for using MailHide within Plugin Gone?

I have a plugin which (among other things) writes email addresses onto certain pages of a site. With previous versions of wp-recaptcha I used it’s mh_insert_email() function to obscure the email addresses.

Recent versions of the plugin don’t seem to have that function though. How can I use wp-recaptcha to hide email addresses that are output from other WordPress plugins?