.kpmap

A .kpmap file is an editable file that can be used in Koopatlas. Keep in mind that setting it to be opened up by Koopatlas is pretty much useless, as directly opening up a .kpmap will open up a blank map instead of yours.

How To Open A .kpmap File
A .kpmap file can be opened by opening Koopatlas, going to  and selecting your map.

Important Info
This file is not able to be used inside of Newer SMBW. If you want to use it in Newer, you will need to export it to a .kpbin file.