If I did it correctly, and I also removed any autobooking, here's where I at least found where to go. Whether or not it works out right with airbnb is yet to be seen.
1. Click on Host on main page after you're logged in
2. Click on manage listings
3. Click on listing you want. Select the Manage listing option if it's there
4. On listing status section, click Edit.
5. Select the option on the dropdown box you want.
6. Click Save
If the button color beside your listing hasn't changed, the system didn't accept the new input. I don't do auto bookings so there's also a chance it has an over ride feature or something.