I tried using the mod with Space Exploration and a bunch of other mods and got the following error whenever I want to load a save or start a new map:

The mod Edit Map Settings (0.1.6) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event EditMapSettings::on_init()
EditMapSettings/map_gen_settings_gui.lua:474: attempt to index field '?' (a nil value)
stack traceback:
EditMapSettings/map_gen_settings_gui.lua:474: in function 'set_to_current'
EditMapSettings/control.lua:40: in function 'set_to_current_map_gen_settings'
EditMapSettings/control.lua:58: in function 'set_to_current_all'
EditMapSettings/control.lua:255: in function <EditMapSettings/control.lua:252>

The issue seems to be planet-size. I added 'and name ~= "planet-size"' to the if statement in line 473 and it the map loaded.

like this ?

if control_prototype.category == "resource" then
  checkbox = resource_table[ENTIRE_PREFIX .. name .. "-check-wrapper"].check
elseif control_prototype.category == "terrain" and name ~= "planet-size" then
  checkbox = controls_with_scale_table[ENTIRE_PREFIX .. name .. "-check-wrapper"].check
elseif control_prototype.category == "enemy" then
  checkbox = enemies_table[ENTIRE_PREFIX .. name .. "-check-wrapper"].check
end

Yes, exactly.

thanks