NjalTheKnut

Confirmed, it crashed just as you said. I confirmed this CTD also occurs for some mod-related enchantments, in my case, the "Pentamagic Loop" from Caranthir Tower Reborn. The EFF Magic menu stopped triggering a CTD when I unequipped this ring. I am unsure, but perhaps it is something to do with how EFF or UIMagicMenu handle enchantments with the MagicDisallowEnchanting keyword on them. I doubt it, but perhaps it is something worth investigating another time. Another thing to note: This CTD happens with ALL editor utilities, such as Project Proteus, and Grimy Utils. I was getting the same behavior in their equivalent menus, so perhaps this is a failing of UIExtensions, not EFF?