I currently have a bunch of devices in my scan results showing up as "Unknown" and the "Monitors to be added" column shows 'NaN'. I'd like to get rid of all these monitors, but they don't seem to want to go away. If I select them all and choose "Delete", it confirms that I want them deleted, but they don't go away. I have a feeling this is why v9 just crashed while I was doing a scan. Is there a way to clear out the scan engine results?