Uninstalling CircleCI

1. Navigate to: https://github.com/settings/installations (If necessary change the org by clicking Switch to another account on the top left)
2. CircleCI App should be shown on the page of Installed GitHub Apps tab then click Configure
3. This should take you to the CircleCI Apps Configuration page. Scroll down to Danger Zone section and Click Uninstall which will remove the triggers sent to CircleCI.

Re-installing CircleCI to GitHub App

Please navigate directly to:
https://app.circleci.com/settings/project/circleci/<orgID>/<projectID>/triggers/add

(replace orgID with the organization ID from your Organization Settings and replace project ID with the project ID from Project Settings). At that point, you will be able re-install the CircleCI GitHub App and create a new trigger.