I just clicked the "Update" button in the Mac Codex app, and the app quit and deleted itself. I went to download it from the download page, and it downloads a copy of the ChatGTP app.
Am I doing something wrong, or is this OpenAI unifying things?
I was having this issue and after installing and installing ChatGPT desktop, I finally got the ChatGpt Work, that has CODEX merged to it. So, if you still didn't get it right, try uninstall and install again and again and maybe again hehe.