I have configured the dashboard to scan for changes, I think, but it doesnt.
Twonky re-scan interval is set via the Twonky UI, not the Dashboard.
You can also perform a media re-scan from the Twonky UI (and from the Dashboard). You shouldn’t need to restart it.
The rescan behaviour can be controlled using the Settings|Advanced|Rescan Interval
control in the Twonky UI. The default value is -1, which should make it ‘talk to’ the file system, so that changes to the file system cause a re-scan. Setting the control to a positive value will set a rescan interval in minutes. I use 1440 to give a rescan once per day.
Maybe have a read of: