Once you're signed in, head over to your Deliveries and scroll down to the order you want to change. Weekly orders are organized by delivery date, with your past, current, and 3 future orders available to view.
Select the drop-down menu under Meal Plan to select the desired amount of meals you'd like for the week. Whatever you choose will only update for that specific week, not for all future orders.
To make a permanent change to your subscription, update each and every week available in your Deliveries (this allows for the change to reflect sooner!). From there, head over to your Settings and click "Change" next to Weekly Default Plan. This will update all future weeks not currently available in your Deliveries.
One last thing! When you up your meal plan or select a smaller plan, we'll automatically add or remove meals on your existing menu. So double check your orders after making a change!