Which download do I use, Claude or ChatGPT?

In some instances, what you purchased might have two download options, so you can use whichever AI you already love.

Using Claude? Grab the Claude download. It installs as one plugin through Customize → Plugins.

Using ChatGPT? Grab the ChatGPT download. It installs as one or more skills through Skills in the ChatGPT desktop app.

You only need the one that matches the app you use. Each download has its own PDF of instructions inside, written for that app.