Click "Tools" and "Template Library" on the left menu. Then go to "Published templates" and unpublish the template by clicking "Unpublish" on the right of the template name.
Note that when you unpublish templates, they remain in the organization and with the organizations that have already chosen to save them on a previous occasion.
Then go to "Publish template" and select the template you want to publish by clicking "Publish" on the right of the template name.
Write a title and a description, and choose a privacy level. The privacy level controls who can share the template. For example, Public templates make the template visible to all Boardeaser users. Continue by clicking the "Publish" button.