hey,
addDicType does somehow not work for me. The generated json file only shows OCEAN but not WATER

Script:

Water = forBiomes(0, 7, 10, 11, 24)
Water.set("name", "Bloody Water")
Water.addDicType("WATER")

Yep. That's a bug. Fixed in latest build.

1.7.10:
http://jenkins.superckl.me/job/BiomeTweaker/164/

1.8:
http://jenkins.superckl.me/job/BiomeTweaker%201.8/163/

Let me know if it works for you.

Works now, thanks :)