MB64, MB16E, MBMF and MIDIbox64SEQ will be ported to MIOS as soon as I finished my running projects. In the meantime you could use the ain64_din128_dout128 test application which don’t come with a menu or defined SysEx structure, but already supports 64 pots and a lot of buttons and LEDs.
All the known MB64 features will be available with the ported firmware, but if you want to start with some experiments, an upgrade would already makes sense.