Setting up MC Command Center in Sims 4 - which settings matter?

Also check the MCCC version matches your game patch. Every time EA pushes an update there's usually a new MCCC build a day or two later, and an out of date one either does nothing or throws lastexception files. Keep the whole MCCC folder together when you update, don't mix old and new files.

First make sure it's actually running: script mods ticked in game options, and the ts4script file no more than one folder deep inside Mods. Lots of 'MCCC does nothing' is just that. The makeovers you want to stop are the game's own townie outfit changes, and MCCC has a toggle for them in its population/townie settings, the wording varies a bit between versions so look for anything mentioning makeovers or clothing. For slower story progression, the population settings also let you cap how many townies spawn and in the pregnancy section turn down the random pregnancy chance, which is what usually makes a save feel like it's running away from you. Leave everything else default until something annoys you.