Fallout 4 ships with it's own Mod Manager...

[Sacremas]

So this is something really peculiar. Turns out that Fallout 4 ships with it's own mod manager. You just could never see it. It's there in the start up menu.

 

 

That thing under the power armor's eyes, click it, and see this come up;

 

 

Credits; http://www.nexusmods.com/fallout4/mods/640/?

 

[RapidWaterOver]

It's been there for a VERY long time, if I'm not mistaken since the game was first released or very shortly afterwards. I think after the first patch? I'm surprised you're just now find out about this.

[swords and sandals]

I think the last patch must have restored it. 2 patches ago you could access this, and then after the previous one (I think the patch that automatically deactivated all your esps whenever you ran the launcher) you couldn't. Or at least I couldn't any more. The hidden button wasn't there.