I just installed KAB 2.6. I wanted to view the documentation however no documents are to be found. I went C:\Program Files (x86)\SIL\Keyboard App Builder\docs to further explore and the folder was empty. It looks like the latest build did not include the prepackaged documentation files such as install, build, etc.
Luckily, I can find the files on the KAB website resources.
Thanks for letting us know. I’ll add it to the list to fix.