If you use a program like process monitor, you can see TONS of registry accesses when the program boots up, more than I've seen in any other 3rd party program on Windows. What I realized is that they spew their garbage all over the registry. They use sophisticated registry tweaks to prevent you from re-using the trial after it's over. I then needed it again later that day so I tried installing it again and of course it wouldn't let me. Then I uninstalled it because the trial was over. It actually worked fairly well and I was considering purchasing it.
I installed their streaming audio recorder program and used the trial.