I lost my mod files, how to recover?

Hi,

I’ve made a mod some time ago that I want to improve now.
The problem is I lost the local mod files with my old PC, I can still play the mod because I’ve subscribed to it and I have a SGA file. I’ve seen I can extract xml files from it but when I copy the xml files into a new mod it doesn’t take them into account… I don’t really know how it work and what I should do.

There are a lot of files I don’t want to start over ^^

AoE4 Mod Tutorial: Making a Crafted Map in the Content Editor

At one point in the video, the creator explains how to “retrieve the XML files.”
However, he is not directly downloading raw XML files from the game.