First you need to download and install the program. Follow this Link to download it. Please make sure that you have the latest Java Runtime Environment installed aswell. After it's on your PC install it like every other Program.


Now launch it. You will see a window like this:


Click on select and search for your arma3_x64.exe (usually in C:\Program Files (x86)\Steam\steamapps\common\Arma 3\arma3_x64.exe) and click on open.


The next thing you want to do is to tell the Program where new mods will be downloaded to. Click on "Addon Options".


Here you click the blue"+" button.
Now direct wherever you want the mods to be downloaded to (make sure you have enough space. About 30GB should be available!).

Please make sure to use a different Folder than the Arma 3 Insatllation folder.
We often encountered that people have problems with Arma3Sync deleting files it was not suppoed to.


After that we are going to configure the launcher. I give you a little suggestion how I set up my launcher:


  • Profile: Automatically loads the selected In-Game profile
  • Huge Pages: Enables hugepages with the default memory allocator (malloc)
  • No Splash Screen: Disables splash screens
  • Default World Empty: Select a world loaded by default. For faster loading!
  • "No logs": Be aware this means none errors saved to RPT file (report log) (logs can cause lag though)


Okay, let's start with the really interesting part. Go on "Repositories" and click the blue "+". On "Public auto-config url" you post this URL:


  • 1. Click on the Blue "+"
  • 2. Put "ftp://srv.stafclan.com/STAFPMC/.a3s/autoconfig" in Public auto-config URL
  • 3. Click Import
  • 4. If connection is "Succesful": Click "OK"
        If not check your input


  • Notify: When Checked notifies you when the repo is updated
  • Auto: When Checked automatically updates the repo

    Be aware that the programm has to be running for these options to do anything!
  • Status: Shows you whether your mods are up-to-date or not