Format not recognized

[Aikmann]

Hello, I have a world that I really would have converted and updated. It appears to be in PMF format, but it echos out that the format is not recognized.

These are the files the world has:

chunks - (folder)
players - (folder)
bupdates.yml
entities.yml
level.pmf
session.lock
tiles.yml

For some reason I can't upload a zip of the world to this post "Zip is not supported, try Zip instead..."

Thanks