I installed for the first time chatgpt on macos, downloaded the file form OpenAI. Everytime i open the chatgpt "prompt" it defaults to "Codex" as i am doing some kind of project or work? i just want to default to use the regular chatpgt. it now says ive used my "credit" i've looked in settings i cant turn of codex, or when i open the ChatGPT promt "Alt+Space" i can not choose not to use "5,6 Terra" can somebody help or do i have to open ...