Hi Lee,
Normally I might expect settings after power on to be dictated by the System file but in this case it does not appear to be so. My Genos which is fully updated always gives me slider control (ie. Your preference) but If I then set it to Knob and save a System file it ignores that and continues to give slider control at startup, so System in this case does not appear to be involved.
So as you have suggested it may be your registrations that are affecting the assignment, but this is only likely IMO if you at some point saved them with Live Control ticked while the settings were against you. (I have never saved LC to regs. The parameter values continue to display regardless).
What control does your Genos give you after startup and before you touch any reg button - slider or knob?
If it is slider and you then set Freeze to Live Control and turn it on (before touching any reg button after power on) does that then preserve the slider status to what you want?
If this works it may provide a workaround or at least give stronger clues as to where the solution might, or maybe doesn't, lie.
John