Sorry to hear you are having problems. To answer your questions in no particular order. Yes, it is customary that we do c;lose a ticket if we can't do any more at our end until an update is released.
The developer is still working to resolve the problems brought in by the recent SU and this is affecting other developers' titles, not just Real Taxiways. There are some possible workarounds that we are looking into and also some issues that we are trying to get Microsoft to resolve.
As soon as we have a solution we will get an update out to all users.
Thank you for your patience and sorry that SU6 has caused you issues.