How do I disable the map editor in HoMM3 HD?

Thank you! Could you please tell me if I just need to insert this line of code into the template's .rmg file?

I don't want to install the mod yet.

Update: I think I misunderstood; I just enabled the plugin, and it seems to be working. Thanks!

Added after 1 hour 32 minutes
So, I just created another map, and the cartographer appeared(( Although I set "none" everywhere in the plugin.