Is that part of the User-Agent string or part of the URL?

Suggestions would be
Did you drop the file(s) in the proper zencart folder?
Did you properly edit the 'example' file and/or create you own copy of it?

You will still see them in the cpanel with a 410 error but not in your zencart whosonline.
You didn't say where you are seeing them.

Not a coder here, it would take DrByte (who wrote the code snippet) to say why it is not functioning in v154