sasa_08 Hello there! You can download the compiled mod from the GitHub Release, so, extract and put the folder with mod.ff inside %localappdata%/Plutonium/storage/t6/mods/.
If mods doesn't exists, you could create a new folder and rename to mods, no problem.
Your final file tree should be something like:
t6/
│ ...
│
└── mods/
│ ...
│
└── zm_sliquifier/
│ ...
│
├── mod.ff
└── mod.json
So, open the game, go to mods menu, and load the mod, after all, it's done, the Sliquifier will be available at mistery box.