On starting up most downloaders (WAU included), it says to make sure to back up your addons.
Also, make sure you have the latest version of WAU, that's basically the issue for post people.
I have the latest WAU and i still get the errors that i posted earlier. I do back up my addons and i don't mind those errors at all, especially since the newest version got released today. I just hope they all will get fixed in the near future. Keep up the good work.