Thanks! OMG! I'm new to MO 2 and being able to see mod content at a glance is so helpful. The content shows that HDT Physics Extender is an SKSE plugin (no .esm or .esp files). That gave me an idea: I tried installing and activating Papyrus Util - another SKSE plugin, to check and see that this problem affected all SKSE plugins. PapyrusUtil is having the same issue: active in left but not loading in right panel plugins (or LOOT or in-game) So the problem seems to be with SKSE plugins. Any ideas what might be causing this? Thanks again so much for your time. https://drive.google.com/file/d/1H_QRamhpNJnQkmtEvvKLfxNxDklJjADY/view?usp=sharing