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Yeah, you aren't going to find configs for this in forestry as the two mods involved are Extra Bees and Gregtech, if there is config for this it will be in the configs for one of these two mods.
My advice now is backup your saves folder and re-install your instance of FTB, should be able to play your world again, then you can try updating TF again if you still want to :P
I remember I had to do the same thing, but i didn't get any errors.
I'd recommend deleting the twilight forest zip (or cutting it out if you want to back it up or whatever) then get a new one and place it in there after removing the old one.