What is the behavior using the KPG un-encrypted output profiles?
Custom Color Tools can edit the input transforms (CMYK to Lab) of the KPG profiles. The KPG profiles initially only contain the input transform (CMYK to Lab); the output transform (Lab to CMYK) is created on-the-fly by the KPG CFM when needed for image processing. Refer to the Custom Color V 3.1 Users Guide Page 91-93.”Special considerations when editing KPG CMYK output profiles” for more information.