don't attempt to restore settings from old qt-settings config file We changed the default settings file name in 2019. It's time to let the old name go. * resource-manager.cc (resource_manager::resource_manager): Don't attempt to copy settings from old qt-settings file used by Octave prior to March 2019.

#include <octave/oct.h>

DEFUN_DLD (addtwomatrices, args, , "Add A to B")
{
  if (args.length () != 2)
    print_usage ();

  NDArray A = args(0).array_value ();
  NDArray B = args(1).array_value ();

  return octave_value (A + B);
}