FlexColor is not quite as advanced I am afraid.
It was written primarily for tethered captures. ie. Shoot Custom White, Apply, Shoot actual Image, and not much flexibility otherwise.
However, if you have captured some images to CF card, or an Image Bank, if you import the CW shot, apply it and then import further captures, they should also have the CW applied.
I am going from memory and haven't tried in a while, but have a go and let me know if it doesn't do the trick.
The Phocus version looks great!!!
Right now I can only use the FlexColor version being on the PC format.
I know the software developers have been busy on the Firmware upgrade but any indication on when a Phocus PC version with this feature will be available? Even as a beta...