Developer documentation for different versions

On the page, I can choose between version 6.0 and 6.1. Does this imply that newer versions are not recommended, yet? If not, where is the documentation for 6.3 to be found?

there is no oxid eshop 6.3 available yet. 6.1.4 is currently the newest stable version.

Thanks for your clarifying answer. I was confused by the version number for the component “OXID CE component”.