A giant overhaul expanded the functionality of the add-on, even calling for a name change. Instead of just setting modifier visibility, now you can control visibility of objects and modifiers to see how your model looks at a specific LOD level. Control is based on presets consisting of regular expressions. In addition to built-in presets, you can create your own ones, as well as you can export, import and share presets. See the README.md for a detailed guide and an example Blender file.