Due to different reasons (lack of time, technical limitations, and other projects and priorities), I am unfortunately no longer able to actively support TurboGo. This includes the Joseki Tutor and the screen saver.
The programs should still work fine, but as stated above there are much better programs available these days, and I certainly would recommend you to try them! Google is your friend here.
It is also no longer possible to register TurboGo. I will try to make a fully functional version of TurboGo available, with the "demo" restrictions removed.
If you have any questions, please feel free to contact me via email.