Go to the github page on the front and download the entire file as a zip,

then this is the tricky part so buckle up cuz i just figured this out myself

open up arma 3 Eden editor, open a map (any map) then save it. close eden.

then find where that new mission u just made when, copy everything within the dissension%altis% (what ever the hell the name is with the % signs) and unpack the entire contents into the missions folder

then open eden and make sure u save it/export it as MP.

PS: that last step may be wrong. never done this first time with editor, about to launch my self as i just threw this at a different map and im shaking with excite me cuz now all i need to master is the art of adding mods that it uses i have no idea how he did that yet.


Addendum, make sure you get the files outside the folder too just incase. havent found any literature that it needs them, just bein safe. AND replace all files.