I assume this is either easy and I'm missing it or it's not working yet?

It generates fine in the overworld. I want it to generate in dimension 111.

Help! please.

What version?

The seperate dimension isn't implemented yet in the 1.16 version. That's on my todo

lostcities-1.16-4.0.3-alpha.jar

This is the config file

#General settings
[profiles]
#A list of dimensions with associated city generation profiles
dimensionProfiles = []

I've tried "lostcity" and "111" in the brackets.

A copy of a working config file would probably solve this for me.

Basically, I want to have a dimension of lost cities in our modpack (have been eagerly awaiting your 1.16 release. :) ) but not have lost cities in the overworld.

The configuration button is working and I set up a default profile and Lost Cities's is generating cities in the overworld.
There isn't a dimension in the dimensions folder and the bed won't transport me to a lost city dimension.

These also failed.
#General settings
[profiles]
#A list of dimensions with associated city generation profiles
dimensionProfiles = [0:default,lost:default]
#General settings
[profiles]
#A list of dimensions with associated city generation profiles
dimensionProfiles = [overworld:default,lost:default]
And this
#General settings
[profiles]
#A list of dimensions with associated city generation profiles
dimensionProfiles = ["overworld:rarecities","111:default"]

It would probably be nice if you had an "overworld/dimension" button / checkbox on the configuration screen.

Ah! Thanks!
At least I'm not going crazy.
The configuration interface you have now is very slick and intuitive.
I'll keep an eye on the mod for when it gets alternate dimensions again.