To create a new organization, first go to the application's homepage.
If its your first organization, you will see a form waiting for you to fill the name of the new organization:
If you already have one or many organizations (created by you or somebody else), you must click on the “+ Add a new organization” link:
Then the form will appear.
Type the name of your new organization. You can create organizations with the same name (but maybe it's not a good idea).
Once the organization is created, you'll be redirected to its settings page.