I understand the point of this mod is to spawn in the antimatter world, but I would like to know how to spawn in the default worldtype in a single player world

I encourage people to play the pack as designed for managing bugs and things, but obviously people can play however they want. Anyway, config/HardcoreMapReset.cfg change the line B:"Show Create World Button"=false to true then restart the game

Thanks for an amazing quick response