Hi! Not sure if it’s too late, but here is the solution:
OPTION 1: Edit Sidebar Partial
In your Publii directory, go to:
Open the “sidebar.hbs” file in the code editor of your choice and edit the line I highlighted in the picture. Swap it out with whatever you want to have instead of “Editor’s Pick”.
Save the file, and hit the “Preview your changes” button in Publii.
OPTION 2: Edit .lang.json
Alternately, you can go to:
Open and edit the file “editorial-2.lang.json” in your code editor of choice. Near the top of the file, you’ll see this:
"editorPicks": "Editor Pick's",
"getInTouch": "Get in touch"
Change the text in “Editor Pick’s” to whatever you want.
I purchased the ProDocs theme, and did not receive additional documentation. The devs only provide support for installation via the premium ticketing system, but they won’t help with anything extra that you might want on the site (I was referred to this page in the past: https://getpublii.com/terms-and-conditions/). From what I understand, the devs at Publii are the theme authors.