Docs / Docs

Installation

Modrex is a desktop app for Windows and Linux. Download the build for your platform, pick a supported PAYDAY game, and start managing mods - there's no account to create.

Download & install

Grab the latest release from the download page or directly from GitHub Releases.

Windows

Run the Modrex_x64-setup.exe installer and follow the prompts. Modrex checks for updates on every launch and can install them in-app - you won’t need to manually reinstall for future versions.

Linux

Pick the package for your distribution:

Choose a game

On first launch Modrex asks which game you want to manage. Supported games:

You can switch games from the sidebar at any time. Each game keeps its own path, launcher, launch options, installed list, and folders.

Game detection

Modrex automatically scans for the selected game across the launchers it supports. If it finds your install, you’re ready to go.

If detection fails, set the path manually:

  1. Open Settings from the bottom of the sidebar.
  2. Under Game Path, click Browse and select the game’s root folder.
  3. Modrex validates the path and identifies your launcher.

Select the root folder, not the mods folder. On Steam this is typically SteamLibrary/steamapps/common/<game name>.

Launch options

For most PAYDAY 3 mods to work, the game needs the -fileopenlog launch argument. Add it in Settings - Launch Options, or directly in your launcher’s launch arguments for PAYDAY 3.

-fileopenlog is a PAYDAY 3 requirement. PAYDAY 2 and PAYDAY: The Heist use loader-based mod systems instead.

Requirements

GameSteamEpic GamesXbox App
PAYDAY 3yesyesyes
PAYDAY 2yesyesno
PAYDAY: The Heistyesnono