It works like a charm now, everything is loading.
I'll give it a try now, good job again and keep up the good work on your editor, you're amazing
Edit : I don't know if it's normal or not, but my equiped stuff still doesn't appear, but it's not a huge disagreement, just need to unequip IG before editing.
Edit2 : Nothing is happening when I click on "Add item" too, but I'm still able to modify existing items (I guess?) so I'm just gonna use junk items to create new things for now.
Nah, better not change an item into another one, the game doesn't like it at all.