The problem is that in both the Excel and Numbers files the Smoother is not smoothing! The result is that the text file that you created still has the raw values. By any chance did you not enable macros when you opened the data file? I know that Excel asks permission to enable macros every time I open Smoother (or any of the PiezoDN tools).
When I open Piezography>Tools>129STEP_PIEZODN_CGATS_SMOOTHER.xlsb in Excel I always get an option to Enable Macros.
You must select Enable Macros otherwise the Smoother doesn’t work. This might explain why Excel is failing, but I’m not sure about Numbers since it does not have that option.