Stop MS Word from opening up old files when starting up

In general, I like the new Mac OS versions but the one thing I don't like is that applications like MS Word open up all my old documents when they start up again. Here's how to stop it:

Type the following in terminal:

defaults write com.microsoft.Powerpoint NSQuitAlwaysKeepsWindows -bool false
defaults write com.microsoft.Word NSQuitAlwaysKeepsWindows -bool false
defaults write com.microsoft.Excel NSQuitAlwaysKeepsWindows -bool false

Very user unfriendly. Poops.