No, I'm afraid the dodeca-hexa didn't make it into AC3.5 so the next best choice is to use "master" (aka "latest"). This is slightly risky because the software won't have gone through beta testing so it's fly at your own risk. It's fairly stable at the moment though.
To load "master", go to the MP's Install Firmware screen and press Ctrl Q. You should then see the version changes to APM:Copter V3.6-dev and you can pick any of the multicopter icons (quad, hexa, octa, tri, y6) because they've all been consolidated now.