I noted when trying to add the mod to both existing worlds where circuit-networks was already researched and new worlds that it only correctly unlocked in the new worlds.
After some research I concluded the mod could be fixed by adding a migrations directory and lua file to check that if the tech has been researched and if so unlock the recipe. This allowed the mod to work in existing worlds.
The code I put in the migrations/pushbutton_0.17.0.lua file follows:
for index, force in pairs(game.forces) do
local technologies = force.technologies
local recipes = force.recipes
recipes["pushbutton"].enabled = technologies["circuit-network"].researched
end
Hope this helps, cheers o/
