To change your organization details, go to http://app.rarchy.com/organizations/settings, or click the settings button next to your organization in the left-hand navigation menu / your organization name in the profile dropdown:
To change your the name of your organization or your organization's website, click the blue edit symbol to the right of the respective detail you wish to edit.
This will bring up a popover to allow you to edit your organization details - click Save when you're happy with the change.