Having attached bet plan(s) to market(s) you may cancel them if required using one of the following methods:
By clicking the “Cancel” button on the Betting Plan summary tab next to the Selections list.
Also, by right-clicking on the Markets list grid or clicking the tools menu and selecting one of the Cancel options on the popup menu.
When a bet plan is canceled, any remaining unmatched bets in the associated market will be canceled.