This is probably a stupid question, but I got this in the bundle for racial justice and equality on itch.io. I have never used itch.io before, and I cannot figure out how to download this game even though I own it. Help?

You have to go to "My Library" (the arrow in the top right corner when you are logged in)
There you have to select "My Purchases" -> "Bundles" -> "Bundle for Racial Justice and Equality"
Then you should see the list with all games and download-buttons