Fallout 4 Mod Manager for Fallout 4

What is that?

I created a small mod manager. It can manage esp files and install / uninstall mods. It also edits all necessary files.

If you have errors let me know and I will fix them.But when it comes to functionality I’m not gonna add anything.This is intended as the most minimalistic mod manager that still has enough to offer to be usable.

Github: https://github.com/grasmann/Fallout4ModManager

Credit: grasmann

Fallout 4 Mod Manager
Fallout 4 Mod Manager


When you close the Mod Manager or Start the game via the Mod Manager it sets the plugings.txt and
DLCList.txt as readonly.

I’m not 100% sure but I believe the Fallout 4 Launcher resets them and inserts all esp files in the data folder.

The Mod Manager will create a folder ” Mods ” in Fallout4/Data to manage the installed and activated mods.Don’t delete it.

Installing Mods

When you click install you can browse for a zip, rar or 7z file.
This opens a Mod Solver dialog similar to the one in Mod Organizer when the mod can’t be processed automatically.
Mods are installed to a cache folder in Fallout4/Data/Mods/Cache since 1.0.21.

Mod Solver

Just choose the files there ( Drag and Drop ) so that the files are in the correct structure and install.
Correct structure means the base node in the treeview represents the data folder.
Esp files and folders like textures, meshes, audio and so on need to be a child of that node.
Basically drag and drop everyting that goes into the data folder to be a child of the data node.

Uninstall Mods

When uninstalling a mod the Mod Manager deletes all files of the mod and attempts to clean the data folder.
What this does is basically go through all folders and delete the ones without files in them.

Activating / Deactivating Mods

Since 1.0.21 Mods aren’t installed into the data folder directly anymore.
Instead you will have to activate them to use them.


Since Version 1.0.5 the backup functionality was improved and is much more useful now.
When installing mods that overwrite existing files you’ll get a list of them to choose which ones should be overwritten.

When uninstalling mods the mod manager will find created backups and offer to restore or delete them, again in a list. Only one backup per file though.

Issues and problems

1. After using the mod manager my game crashes on startup

The solution to this seems to be deleting Fallout4.ini and Fallout4Prefs.ini in
%USERPROFILE%/documents/my games/fallout4
and let the Fallout 4 Launcher recreate them.

But also make sure that plugins.txt and DLCList.txt in
aren’t readonly anymore

Reason is not clear yet.


.Net 4.5


Current plan is to support this until Mod Organizer supports Fallout 4.
This is meant to fill the gap right now, nothing more.


Fallout-4-Mod-Manager-495-1-0-30.zip (222 downloads)

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