Below are the following two methods that can cancel the trial of PDF Editor Cloud.
1. You can cancel your trial via My Account.
To do so, please Login with your Foxit Account (https://account.foxit.com/) > Go to Subscription Management > Locate Foxit PDF Editor Cloud > Select Cancel Subscription. Once selected the trial of PDF Editor Cloud will be cancelled.
2. After logging in from https://pdfonline.foxit.com/ > Select the Ball Icon on the top right corner as this will display how many days are left for the trial period > Select Cancel.
Once selected, this will redirect you to your Foxit account to cancel the subscription.