When I had this keylogger it was over a month ago and I got it from wowinc client installer, so it looks like their exe files were compromised at some point also. It took me a whole day to get rid of this keylogger and the only way I eventually did it was installing kapersky. It found it immediately and the three nasty files. It might be worth getting a month's free trial if you still have trouble after the batch file.
It is very nice to see an addon site actively and openly doing something about it. I knew there was a reason I liked wowinterface a LOT.
