The default flooring option has the changes to the wood, gravel, and cobblestone paths, the crystal Path is unchanged

in the options folder are the many different colors of crystal Path you can choose from, all other changes are the same as the default version.
To install the different options, choose the one you like and place it in the Stardew Valley\Content\TerrainFeatures directory.
also note you can only install one option at a time, obviously, and please remember to back up your original Flooring.xnb file!