So my thought was basically.. either it was forgotten to change the filename .. or the link was going to the beta and noone ever got to play the "final" :)
Indeed... well seen !
In fact it's a "bug" in itch.io
The download module automatically renames the zip with the initial name of the channel (which was... beta at the beginning).
My original zip is correct. I don't know if I can change it... I did not find how to do it
In any case it's the correct (final) version that you downloaded