Yes. Tore my hair out. Latest keylab49 bin, MC. Followed all the intructions A HUNDRED TIMES.
On the 101st attempt, Close MCC and any midi / audio apps, Turn off the KB, hold both octave buttons and repower the KB, keeping both octave buttons pressed for > 5 secs.
I'd done this 99 times before to no avail, but finally it worked... Still testing, but its a start.... Hang in there, folks... it will eventually work.