People were requesting that I update this add-on to work with the Xenforo 1.4 beta 2. I don't have access to a running copy of the beta, but I was able to make the changes just by examining the beta source code, and several users have confirmed that this compatibility fix works.
If you're currently using Xenforo 1.3, you won't need to update to this version, but it won't hurt if you do.
If you're using Xenforo 1.4, the previous version of this add-on will definitely not work, and this update should fix that, at least for beta 2. However, this compatibility fix might break by the time Xenforo 1.4 is actually released.