Cool! You are quite welcome.
I'm sure you'll find your own way of working with it, but in case you are interested, I tend to leave mine permanently set to:
a) I don't muck around with their different in-camera crop settings. This doesn't buy you anything except saving a tiny bit of storage. I just use the crop setting ( 6x7+ (?)) that maximizes the area of the sensor that it uses. If I want a different crop, for safety, I do that afterwards, on my computer;
b) B&W - Their color settings are OK, but I don't think they are as spectacularly good as their "F4" fine grain, medium contrast B&W setting. It's nice to be able to pull out what amounts to a dedicated B&W camera that's ready to go. If I want color, I usually just switch to Apple's built-in camera app (set to HDR mode), unless there is some taxing exposure situation that needs a semi-manual override that "645Pro" provides;
c) Displaying a histogram.
d) Saving both the "semi-RAW" data and the processed shot to my camera roll, both with maximum resolution, minimum compression.
In contrast, I use their AF, AE and AWB lock buttons on virtually every exposure. I'll also play around with their built in pre-conversion color filters if I'm in the mood for "classical efx". What I really wish is that they provided a simple exposure compensation adjustment like on "real" cameras. That would simplify a lot.
If I think of anything else that might be useful, I'll let you know.
Have fun and post some pix!
T