Alright, I give, what am I doing wrong here? I download this thing but I can't get it to run at all.

I extracted the entire thing into it's own directory but when I click on the executable jar file it says it can't find the main class Mapmaking.main program will exit.

I know this has to be something stupid but for whatever reason I'm just not getting it.

edit: BAH nevermind, I looked up 2 posts above and downloaded the missing directory and it's going now.