I only purchassed legendary planes from the store, nothing else, except the Spitfire that I bought on FlyingIron website.
I downloaded ModManager to check if something else was installed, and I didn’t see anything more that what I listed before.
I used ModManager to uninstall those 4 mods and… my full Micrsoft Flight Simulator folder became empty 
I re-lauched the game, and now I have to download 125 GB… I don’t like to use mods because I’m afraid that they can break something, now I understand why 
I’ll keep you in touch when everything willl have been installed back