1. If you are reading this on GitHub, please download Almajara from Code > Download ZIP and extract the folder. The contents of that folder are the Almajara planet packs which should be put into GameData, the PluginsSource folder, and some other files. Delete the residual files and the PluginsSource folder left behind, which includes this file. Otherwise if you want to use Spacedock, just download the file.
2. Put the folders with Almajara planet pack names, such as Almajara-LastLight, in your GameData. Delete the residual files and the PluginsSource folder left behind, which includes this file.

The folders you need are the names of Almajara planet packs, such as Almajara-LastLight. PluginsSource contains the C# code for the mod pack's plugins and is not required and does nothing. The LICENSE, README.md, and SETUP TUTORIAL.txt (this file) are also not needed and will have no effect.