Since there was no answer, I managed to get the link and download it manually (tried before, this time worked, don’t know why).
However, as expected, it won’t run so here is the commnad line needed to make it work:
sudo xattr -cr UnrealQFEInstaller.app
Now get inside the package, Contents, MacOS where is the executable:
sudo chmod 755 UnrealQFEInstaller
Now it will run and fix the editor.
Unfortunatelly the editor has crashed while opening my first project, so I will try the Linux version, maybe in this PC or my PC Gamer. Better luck to you that is reading this!