Regenerate Automatic LODS

How do I force all of my static meshes to have their automatic LODs regenerated in 4.14, as we can do with HLOD? I want to tweak settings like number of LODs and pixel error for a particular group, but after changing the INI file I cant find any way to update existing models, short of opening every single one individually, unassigning the LOD group, and re-assigning it again. This is impossible for a real project.

You can reset lod group from current to something else and back with c++ code and then rebuild modes. It’s quite inconvenient but works.