It's very simple, you don't need to install "WATER CAUSTIC".

instruction:

1 - Unpack the zip file.

2 - In your library create a folder "WATER_CAUSTIC" and copy the files inside.

3 - Open Blender: edit/preferences/file paths/add path to asset libraries, select the folder and you can find all assets in "asset browser panel". 

enjoy!

If you have any questions do not hesitate to write us!