There are certainly issues with A9. I have restored A8 to the dropbox in case you need it. I recommend new testers try A8 first.
ruslang: When you click “Continue” for the .NET error did the application function? Also, what is your sound card on the Win 7 machine?
Did you get the DPS audio driver to install? Does version 1.2.3 work on this machine?
Thanks for your patience on this last build. The back-end stuff we are working on is pretty complex so it may seem like we are taking a few steps back as far as bugs go. But the result will be completely a consolidated audio processing engine across Mac, Windows, iOS, Linux and Android from a single code repository.