Hey !
As said in the title how can i change the mod's config ?
(will also help for every other mods)

Hi LeQwouincy, you can find the mods config file in your config folder; it should be named "minershorizon.json." This has basic configuration options as well as a section for adding special ore types to generation. I will keep this issue open until I write some sort of small wiki page on it. Thanks!

Found it, thanks !