When I'm working with my bezier lines, in the Power Stroke settings it defaults to Interpolator Type: CubicBezierJohan.  I would like it to permanently stay on CubicBezierSmooth as that is my preferred setting.  I have used the Default Parameters menu after I have set it to CubicBezierSmooth and gone to Interpolator type and clicked Set.  It does not keep these settings.  I have to change each and every line to CubicBezierSmooth every time I draw something which is super tedious and inefficient.  I have hit Update.  I have hit Unset and then tried again.  Nothing works.  Can someone please explain to me how to set my strokes to CubicBezierSmooth so I don't have to change every line?

What worked for me, was to have a path selected, the Powerstroke dialog open and the default set to CubicBezierSmooth, then close Inkscape. That seems to have set the default to be persistent.

I expect that this snippet can be edited in preferences.xml in the user profile, to do the same thing.

  <group
     id="live_effects"
     flattening="0">
    <group
       id="powerstroke"
       interpolator_type="CubicBezierSmooth" />
  </group>

@TylerDurden  Thanks for the help!  I was unable to get the first to work and I can't find where I need to add the xml.  Can you please direct me?

The preferences.xml will be in the user config directory. The easiest way to get there is via Inkscape menu: Edit>Preferences>System. Click the Open button.

Then I'd open the file with a text editor for coding, such as NotePad++ or Textpad.

Thank you very much!!