Can you try deleting the entire aura? If not, can you do a "/powa debug" and check the log for anything that looks like an error (missing localisation strings/load time messages don't count - everything else does). There's a "copy" button on each row which you can click for a full output string to paste into a post here.
I might just put out another release tonight which will forcibly nuke existing saved variables. I can just hide under the word 'alpha' and get away with it, right?
