This plugin has been retired from use and inclusion in Real Estate 7, documentation is kept for legacy customers.
If you’re using the booking calendar, you’ll need to enable the fields via Real Estate 7 Options > Listings > Listings Single > Enable Vacation Rentals/Booking Fields? > set to Yes, once it’s been enabled a “Rental Info” block gets added to the Edit Listings area with all the associated fields.
You can find more on the ins-and-outs of the plugin in the documentation.