The openGUTS standalone Windows software version 1.0 is now available for download from http://openguts.info/download.html. The Matlab version (previously known as the prototype) is also available as version 1.0. The web page also contains manuals, background documentation, and the source code.
I am looking forward to hearing your experience with openGUTS, and you can use this sub-forum to post your bug reports, praise, complaints, etc.