Comments Plus not appearing on site

Hi there,

I am using Products Theme and I don't see Comments Plus on the site. I saw previous users with similar issue, but I was not able to resolve it as they were able to.

I wish to keep this theme and am willing to alter the theme files.

I looked in Single.php and Comments.php but found no where to put the hooks. (I did make a change to Comments.php to no avail. It is still in its edited state.

Please advise.
Thank you.