Is it possible to automatically purge old data from the SpaceObServer database?
Yes. In the "Configure Scans" dialog, the number of days to be archived can be set on the "Additional Option" tab. If you decrease this value, the database space required for the scans whose first scan is before the set interval will be reduced. By default this value is set to 356 days. Please note that reducing the archiving period will also reduce the selectable interval in the "History".