So Lua files (.Lua extension) do not show up in the content manager. I discovered this when I saved a Persona from the right-click menu. This makes using the Personas that are generated from 3DXchange difficult.

The Lua Personas can be imported from the right-click menu, but, as well as not showing in the CM, cannot be drag-&-dropped from the Explorer.

Steps
Load a persona on an avatar.
R-click, export Persona to either Persona folder (Template or Custom).
Select the same folder in the CM.