The file FLIP_Fluids_addon_1.4.0_stable_(07_jun_2022).zip represents a specific stable milestone in the addon's development.

: Advanced caching and meshing features that are often more efficient than built-in tools. 2. Version 1.4.0 Specifics

: Open Blender, navigate to Edit > Preferences > Add-ons , select "Install...", and choose the downloaded .zip file.