Yes. TTWin 3 does have the ability to turn off the vertical scroll bar.

To turn off the vertical scroll bar do the following:

  1. Go to Configure > Preferences
  2. On the Display tab, under the Scrolling group, check the Hide vertical scroll bar box.
  3. Apply the changes and then click OK
  4. Save the settings to your .twc file by clicking on the disk icon on the toolbar.

The vertical scroll bar should now be hidden.