I hope it’s easy. I just updated two blogs that use an ElevenForty child theme from StudioPress, with a number of CSS customizations, plus content managed via widgets, and the upgrade was fast and trouble-free. I hope we experience the same thing with Epik!
Yes, adding this function to the child theme functions page worked just fine — as long as I also created a custom field called “query_args” and then used “cat=8” in the value field (where “8” refers to the category’s ID number).
Thanks for the help.