Hi I wonder if anyone could help me.

I’ve reinstalled the 767 6 times and every time I install a livery in the ACE programme the livery disappears and then when I try to open the ACE again it says that it’s moved or changed and can not open but I don’t know where it has moved or changed to. The aircraft notepad file in the 767 (not the 4 file) disappears and then the liveries don’t show up in P3D. I’ve turned my anti virus off and followed all the forums advice but nothing seems to work. Also while on here does anyone know how to set the aircraft to a cold and dark state when loading it up on the simulator?

Thank you