Is it me being blind or is there no immediate easy way (if at all) to disable operators individually?
Just for the record - NO crashes or other problems with N2O on Mac with Logic in 64-bit mode so far on my setup. Can't comment about other situations.
If you set an operator to the 'gain' tool, leave the attenuation value a 0.00 db, and do not allow an operator to modulate any parameter for the gain operator, it is essentially the same thing as bypassing that operator.
It took me a little while to figure that out. Basically, I set all 4 operators as described above and listened to the processed signal. It sounded identical to the signal when N2O was not in the chain at all (I suppose you could call this the ultimate bypass).
Hope that helps.