You can turn mashables, mashups and apps off to temporarily stop other users from working with them while you update them and then turn them back on. Only artifact owners and Presto administrators can change the status of artifacts.
To change the status for an individual artifact, open the artifact's page in Presto Hub from search results, bookmarks, favorites or other links and select Manage > Turn Off or Manage > Turn On to change the status and confirm this choice.