I haven't seen that file come through and I can personally say i've never used it on any of my mods.
Are you using any mods outside of the ThorUI AU?
All I can assume is it a piece that was included separate from thorui or left over from a previous mod.
Try removing the thorui directory and let the AU pull everything back down fresh if you haven't already.
Let me know, and don't hesitate to post these issues in the discussion thread.
