I just checked the documentation for the Edison board and the Board Support Package (BSP) User Guide last modification was on May, 8th. Is this the version you’re looking for?
For the Native Application Guide the last modification was on April, 24th. Currently, this is the latest version. I suggest you to keep checking the Documents and Guides webpage for updates.
I think I see the problem now.
If I select Documents and Guides from this page: Intel Maker Support, I get the good (new) stuff.
If I select "Docs" from this page: IoT - Intel® Edison Download | Intel® Developer Zone, I get an ugly 25 page list of date-ordered stuff that includes older versions of the BSP User's Guide and Native Application Guide, but not the newer versions.
This is really confusing.