When the embedded Process Engine is started from Studio (select from the menu), all the information about the organization is copied to an isolated environment where the engine executes processes.
Changes introduced while the Engine is running will not be updated to the runtime environment until the Process Engine is stopped and started, or until a Refresh Engine Data operation is performed. Depending on how runtime engine properties are set, the Refresh Engine Data operation might be performed automatically after introducing changes to the organization structure.
See Engine Properties for further information on how the runtime environment is updated with the latest changes. Some changes might require users currently logged in to WorkSpace first log out before having the changes available in their WorkSpace sessions. Refer to Refreshing the Embedded Execution Engine Data for further details on this topic.