1. Download and Extract the Tool
2. Copy/Paste the 'addons/sourcemod/configs/weapons' folder to your CSGO install
3. Open CMD Prompt -> "cd" to the /bin folder of the tool
3. Now run the following command, replacing the CSGO folder with where CSGO is installed on your PC
java -jar weaponsconfig.jar "C:\Program Files (x86)\Steam\steamapps\common\Counter-Strike Global Offensive\csgo" english
It should take a minute to a few minutes to run, but when it's done, you can navigate to your configs/weapons folder above and see that the file has been updated. You can now copy it to your server(s).
I've attached a SS of my CMD tool so you can see the steps.