Accidental binding of a ppf file

[Khamillion]

Ok, so i got a halo pc mod off of this site(PPF. file) and i do have the ppfomatic thing and i fully know how to use it, what i did BEFORE i knew about ppfomatic, i tryed opening the ppf file, and it told me to chose a program to open it with....so i chose the Bloodgulch.map file, and now will not run as a normal ppf file, is there anyway to reverce this or remove the binding of the file?