Only one version of the addon should be installed at a time. If you are updating the addon to a new version, the previous version must be first uninstalled. The easiest way to install the FLIP Fluids ...
You can achieve the same look as seen in the SM64 renders by using Blender Render found inside Blender 2.79 and releases from before. Sadly with the release of Blender 2.8 Blender Render was replaced ...