These Help pages can be downloaded here with the Winning Bridge Shareware game for Microsoft Windows 98, ME, 2000 and XP.
With Rubber Scoring you should take into account part-scores when bidding Game.
Vulnerability is determined by which sides have won a game.
When one side has won two games the winner is the side with the most points.
With Duplicate Scoring each hand is played on its own merits.
Vulnerability moves with the deal, i.e.: