[Can't update to 1.0.9. c or b Help!]

You're going to want to make sue you're on java version 1.7

[Common Problems & Solutions Thread]

When I start a new world in AtBT 1.0.9c the ore generation has reverted to vanilla minecraft. I personally do not want this and wonder if it's intentional or just a glitch with the modpack.

I started up a version where the ore generation was the way I liked it, copied the text from the config/cofh/worldcustomgen.txt file (EDIT: though I just figured out I should have been editing a .cfg file; I'm still meddling and making no progress), and pasted it back into the file in 1.0.9c, but it still didn't fix this.