[Plugin: Hikari Email & URL Obfuscator] Instructions for custom fields pls!

I’ve tried working through the filter instructions, but I can’t get the obfuscator to work with emails that have been added via custom fields.

I’m using the Advanced Custom Fields plugin to handle the email field, but with the obfuscator activated, the emails display normally.

Any suggestions or step-by-step instructions out there?

http://wordpress.org/extend/plugins/hikari-email-url-obfuscator/