To cancel your trial of Crunchbase Pro (and Add ons), click on Account in the upper right-hand corner of your screen, then select Account Settings.
From the left navigation, select Subscriptions & Billing.
Under the Subscription Management section, click Cancel All Seats.
A window will appear, prompting you to verify that you would like to cancel your Crunchbase Pro subscription (and add ons) and notifying you until when your trial will remain active. Click Continue to Cancel.
To verify your cancellation, click Cancel and downgrade to basic.
Note: depending on when you subscribed the message above may appear different.