This option sets synchronization to be started when you quit Synchronize!.
Normally, you use this option to synchronize your files when you窶况e completed your work.
When this option is checked, Synchronize! will automatically open the settings document and start synchronizing when Quit is chosen.
If you want synchronization to occur when you shut down your Mac, check this option and leave Synchronize! running in the background.
If you are using System 7.5, you may wish to put an alias to the sync setup document in the Shutdown Items folder. Check "Start synchronization when document is opened", and your synchronization will start when you choose Shut Down in the Finder.