Very sorry, I should have an update very soon (look for 3.1...) and it will work with XCODE type files. I had tested this but somehow got fooled by XCode's conversion of old ProjectBuilder files. This also happened before when ProjectBuilder changed internal formats. Also going forward expect to hit potholes whenever Apple does updates of XCode.
I will try to send you e-mail when I get this, if you wish. Also the code is posted to Versiontracker in addition to the above link. That will show you a version change.