Same issue here. I have two ipads, and unfortunately since Apple stopped signing the iOS versions where the X-AIR app works (so I can't downgrade the iPads), we're hosed until Behringer updates. Good news is that basic mix function of the app doesn't crash. Of course, we found this out at a gig yesterday as we were soundchecking. Frantic solutions ended up being to download X AIR app to my iphone and another band member downloaded a 3rd party app to his Android phone. Where we could at least get gains adjusted and EQ done. Though seriously stressful when we're supposed to go on in 20 minutes. Trying to get Mixing Station going, but at this point can't even get it to connect to the XR18. I have the XAIR going through an Apple Base Station. Edit: Got it connected. Just had to determine the IP address.