[Mivereous]

EDIT: Actually, weird, yeah, fresh download isn't working, in any way I can try. Unpacks fine, but then says a bunch of files are missing when it tries to compile, even though they're there. And my old version (still v2) works fine.

http://www.7-zip.org/

It's a .rar file.

Also, you may have to compile once before opening the test map files (CTRL+K).