The install.html instructions has some errors.
1. Missing instructions to replace [HOSTNAME_AND_PATH_TO_JSAPI] in init.js
2. In Test the install the script tag is pointing to dojo.js instead of init.js (in Windows in both places, in Linux only in the sample html)
The Zip is also way smaller than 4.3, and does not have an Asset folder included (which 4.3 had).