Courtesy of Ace:

All instructions are here: https://assets.infantry.zone/

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also, a paste of that just in case you can't access it:

Infantry Launcher/Assets Setup:

Navigate to your Infantry Folder. Default path is C:\Program Files (x86)\Infantry Online
Open settings.ini with Notepad.
Make sure the Assets= path is set to https://assets.infantry.zone/. Note the HTTPS and the trailing slash after the address.
If you get a Permission Denied error when trying to save the file, right-click on Notepad and click Run as Administrator.

I'm just the messenger. Thank Jovan, he's the one who did all this to get it working so hopefully your league stuff can run uninterrupted tonight.

worked thanks

Open notepad as admin, copy paste old text from settings.ini found in
Default path is C:\Program Files (x86)\Infantry Online
into the new notepad you opened as admin, move that file into infantry folder, if you save as same name should just ask you if you want to replace file. Hit yes. On launcher will still have red error message but should load the 390ish files like normal.

It does work.. In my infantry folder it doesn't show up as "setting.ini" but just "settings" I hope that helps.

AFTER THIS FIX NOW I AM PLAYING ON THE BRAZILIAN INFANTRY, HELP.

I did this and it isn't working for me

worked just fine, damn downies

UPDATE: If you delete the settings.ini file completely from your folder and then open the launcher it will download a new one.

<b><u>BE AWARE YOU WILL LOSE YOUR USERNAME/PASSWORD SO MAKE SURE YOU KNOW WHAT IT IS BEFORE YOU DO THIS.</b></u>