You can set the auto-save feature to automatically save your work periodically (for example, every 5 minutes) for recovery purposes. If the Campaign server terminates while you are editing a flowchart, if you had Auto-Save enabled, when you re-open the flowchart, you will see the last auto-saved version.
Campaign stores auto-save files in a temporary directory so that the original flowchart files are not changed. Therefore, in non-recovery situations (for example, if you manually exit flowchart Edit mode without saving your flowchart) auto-saved versions are not retrieved. In this situation, when you re-open a flowchart that you manually left without saving, you will see the last manually saved version.