Attached is a PW51 text file, from the download link, which may or may not be different from your file.
It is space delimited, modified with decimal points instead of commas, and with "space 0" added manually to each of
the 232 points. The MoI script ImportPointFile (existing revised version), was used to import the points into MoI2, as Control Points, and also as
Points. The Control Points curve looks fairly good. The trailing edge shows one point which is irregularly placed, which may be deliberate?
(The trailing edge comes out badly with through points.) There are fewer points on the top of the cross section, versus the bottom.