Just a quick note about the firmware for HERO3+ Black Edition v03.03 (September 2, 2015). This firmware works fine with MewPros.
Note to Genlock Dongle users: Dongle’s software also needs update as it emulates a version of camera hardware; both the master camera and the slave camera (or dongle) must have the same version. The source code in GitHub is now modified to use with the current version 3.03 so please download and install it to your dongle.