The docs always matches the release version.
If you want later docs, like 3.2.0 or current trunk, you have to build the docs from source.
That is NOT recommended, because of all the new features. Stick to the release version, 3.0.4.
Also note the doc sources are in TeX so you can reformat to your heart's content.
(That is actually a cruel remark for Windows programmers, but true)