I am up to date but this is still a problem for me - now vectorworks automatically has the default as arrowheads. There is no none option. I have created a marker with a "0" size to set all my line types so that they don't show up with arrows, but this is really a problem as our design file template was built without this, and then I have to go correct the few line types that do require arrows or tics. Have there been any other updates to this?