Question: how to convert vwx to dwg?
Answer: Open VectorWorks (not free, see Resources section).
Open the .vwx file you wish to convert.
Choose "Export DXF/DWG" from the "Export" drop-down submenu under the "File" menu.
Select the . dwg file format, and choose any other options to customize the conversion, then click "OK" to complete the export. Warning.