You should verify a backup before restoring it.
A backup’s zipped file can be corrupt for various reasons, and the file can also be removed from the backup directory manually. Verifying the backup before restoring it ensures that the restored project is fully functional. See Verifying a Backup.
You must have all applications exit from the project before restoring.
You can send a message to active clients with the Send message to connected clients button in the Connected clients window.
If the check box is grayed out, then you do not have permission to restore to a new location. This permission is set with the RestoreBackupToNewLocation key in the ProjectBackup.cfg Configuration File.
Before the backup is restored, the current database and project file are backed up. After the backup is restored, all backups remain in the list, even if they were created after the backup you have just restored.