These should be extracted to the directory containing your
zenilib/ directory. As these contain
zenilib/ directories as well, they should merge together. If you have a
zenilib/ directory within a
zenilib/, you have made an error.
You must do either a command-line build (using multi-build_sh.bat) or a rebuild of the various projects (using multi-premake_sh.bat) before you will be able to build these using an IDE, such as Visual Studio or Xcode.