Have you downloaded the
kobopatch_4.46.23836_V2.zip file and looked at the files inside it?
Are you thinking of the "Block WiFi firmware upgrade" patch? For more on that, look at the libnickel.so.1.0.0.yaml in the src directory in the unzipped patch files and then change no to yes in the kobopatch.yaml file (much easier to keep all your selections in that one file rather than editing all the .yaml files in the src directory).
For me, there is also a popup that I get after downloading a new firmware update and it is prepared for install that asks if I want to update now or later. If I did not want the update, I would say later, connect to my computer and delete the update files from the .kobo directory on the Kobo.