I must be doing something wrong because I can't find anything but v0.14 on itch. In reading your patch notes, I think I might understand the situation.
It seems the patching framework was part of the v0.13.2 update and thus in order to upgrade from v0.13.1, I must first download v0.13.2 in full, import my save, then apply the patch for v0.13.2 > v0.14.2. Is that correct?
Has anyone successfully imported their save from v0.13.1 to v0.14.2?