Set Checkbox As Unchecked

Hi there,

I’m having trouble with the Beaver Builder > Pricing Fields > Option field.
I’m using one particular form to sell a service, with the Option acting as an add-on feature.
This lives in the Checkout area, and works just fine, except the Option is automatically selected (set as a sole checkbox) and I can see no way to change this.

I would prefer to leave the box unchecked as standard, and allow for clients to check the box if they wish to purchase the add-on (and avoid any accidental purchases too).

Any advice on how to enable this?

Thanks, Lucy