Thanks for the reply, I will try 
It was easier in the original game with the level reset trick. But until the editor is fixed I have no other options.
Small fun fact about scenario home cities. Someone asked on the discord server if it was possible to choose your own home city on a simple “map” scenario. Obviously it is not possible, except in one case:
In multiplayer when you play a more recent civ than the scenario.
For exemple, play Mexicans on a scenario made before the Mexican update:
I think, there is no default mexican deck saved in the scenario, so the game allows to choose your own deck.
What’s weird is that it doesn’t work in singleplayer/skirmish 
So an option can be created by the devs which removes all default home city saved in the scenario and allows players to choose there own decks (let me dream).