I have a similar problem, when I look in subtitles, example Black Ops 2, it shows as LinK not supported and in the subtitles from Borderlands 2 it shows as LinK supported. My filters is working as see borderlands 2 but not Black Ops 2. Both games plays fine and connect to system link rooms normally. I believe the problem began after updating to aurora 0.6b.
Which file should I delete? Can you be more specific?
Thanks in advance!