lol, strange things happen a lot with this kind of thing

My suggestion would be to copy your entire mod folder in "USERS/YOURUSER/APPDATA/ACTIVISION/CALLOFDUTY/" every so often, You can keep it in the same place, just call it like "mod_backup" or something

I quickly got into this habit after spending a week fixing my broken project.

Anyway, glad I could help, not very often I have the correct answer lol