It’s the file above which you’d need to edit for the current version with the line above – that’s the github repo version but the same one that exists in your plugin folder.
Please backup before making changes.
Referring to this: https://support.google.com/analytics/answer/1033867?hl=en
You can add parameters as given there to ensure you get the special URLs
That line would need to change to something like this:
$output .= '<a href="' . get_permalink( $result->ID ) . '?utm_source=crp' . '" ' . $link_attributes . '>';
You should then in theory be able to check your stats to see which links have the crp referrers.
I haven’t personally used these features of GA. The next version won’t be very soon so if it is urgent, I suggest implementing this by editing the code.