How to change world settings for boss spawns after world generation

[Ajosen]

So I started a new world and I really quite like it, but I unfortunately forgot to set the 4 boss spawns to "more" instead of "default" so that there is a guaranteed boss spawn for each season. I was wondering if I would be able to change something as opposed to leaving the world as I have spent a bit of time in this world and don't want to delete it. 

[Canis]

Huh, no one else commented yet?

I don't think there's a way to change world settings of a pre-existing world without diving into the code or something. There MIGHT be a mod on the workshop or something. but, it's a safe bet that you are stuck with the settings you chosen before you made the world. Just hope that the giants come, I guess!