I've had similar issues with Capture, and what I think fixed my problem was enabling the other protocols in the Nomad Shell (e.g. ArtNET) and keeping sACN enabled as well. Leave sACN on the highest priority.
This is the tutorial I used when I was starting off with Vectorworks, had no prior knowledge but this taught me enough to be able to easily create plots. And you can get Vectorworks to generate all sorts of paperwork - gel cut sheets, lighting inventory, and the plots themselves.EDIT: It's...