Hello @motorcitypicturesdetroit,
You do not have to edit the footer.php file.
You have to go to your website > right click on it and select ‘View page source’ > search there for the text/html you want to remove and then copy it > and paste it in your dashboard > Tools > Remove footer credit > Step 1 > inside the field for step 2 enter your replacement for that html and text.
The html you should add in Step 1 is this:
<div class="site-info">
Proudly powered by <a href="https://www.ads-software.com/">WordPress</a><br />
Theme Kiyoshi by <a href="https://felixdorner.de" rel="designer">Felix Dorner</a> </div>
And replace the info in it with your own in step 2.
Please give this a go and let me know how it goes!
All the best,
Mihaela