The Export Email Address addon by DrByte seemed an easy enough mod for my first attempt making an alteration to my ZenCart but it seems I have failed. How can I correct this? I followed the instruction perfectly as best I can tell.

Thank you for assistance.
The mod shows in Tools but takes me to a page that reads:
Object not found!

The requested URL was not found on this server. The link on the referring page seems to be wrong or outdated. Please inform the author of that page about the error.
If you think this is a server error, please contact the webmaster.
Error 404

www.master-zone.net
Apache