Save SketchUp to old version.rb

=begin

Available version constants:

Sketchup::Model::VERSION_3
Sketchup::Model::VERSION_4
Sketchup::Model::VERSION_5
Sketchup::Model::VERSION_6
Sketchup::Model::VERSION_7
Sketchup::Model::VERSION_8
Sketchup::Model::VERSION_2013
Sketchup::Model::VERSION_2014
Sketchup::Model::VERSION_2015
Sketchup::Model::VERSION_2016
Sketchup::Model::VERSION_2017
Sketchup::Model::VERSION_2018
Sketchup::Model::VERSION_2019
Sketchup::Model::VERSION_2020
Sketchup::Model::VERSION_2021

=end

# Save the currently open file as a 2017 version file
status = Sketchup.active_model.save( "D:/test.skp" , Sketchup::Model::VERSION_2017 )

# Save a COPY of the currently open file as a 2017 version file
status = Sketchup.active_model.save_copy( "D:/test.skp" , Sketchup::Model::VERSION_2017 )