is the 14.1 only download works like from 13.0 to 14.1?
As TheDevian already pointed out, you need 0.13.2 for updates. And as 0.13.2 is only available as full version, as a lazy idjit haven't done the patchs for this (yet), so you need to download a full version either way.
Thus you can either download 0.14.1 (full) or 0.13.2 (full) and 0.14.1 patch file. Most likely the difference in size is not existing or neglectable.
Depending on how
Runey makes his patch in the future, it can be that you need to use more than one upgrade file, if you old version is too old.