Copyright Code Change and GDBooster

This is a combo question – some code change for the main plugin, some GDBooster, so please bear with me…wasn’t sure which forum to post in!

I used the final “change copyright” code included below.

It indeed DID change the copyright at the bottom of the page, but actually ADDED my “new” copyright onto the end of the original copyright.

I used Giri’s code from here
https://wpgeodirectory.com/support/topic/cant-edit-copyright-footer-text-in-supreme-directory-theme/#post-301839

I DID use his final dt_remove_default_footer version. HOWEVER, I am STILL having the problem of having the original and then having mine added to the end of it.

To me, that sounds like the gentleman’s comment just ABOVE that final Giri solution. He said:
“…unfortunately I can’t get your solution to not show duplicate footers.”

I had to hide the add_action for this right now because it looked shoddy. My questions are:

A) Should I be doing something more than just that?
B) Is there a way to totally clear the GDBooster — something more than just clicking clear? I.E., can I maybe delete some temporary caching file? Seems like it sometimes takes a long time for changes — say in CSS — to take place. And maybe that is what is happening with this code?

Opinion? Solution?

As always, thanks for your insights!