I know it has been a while, and that is partly my fault (busy) and partly some fault of the WordPress repo system…

Versions 4.2 and 4.3, for some reason, never made it to the live repo…

If you’re in dire shape for an update, you can grab it here until it goes live on the repo:
http://themes.svn.wordpress.org/boilerplate/4.3.1/

Sorry for the delay, and all the hassle,
Atg