Interesting; I can't get very far in this, since after install, hitting F5 and saving my temp.txt just opens the "Viewtop" window again; maybe a problem with command line arguments is causing it to just run "rebol" again?
Red 0.6 featuring support for creating GUI's on Windows is going to be released soon. So, you can wait for that. Or else just download the automated build from http://www.red-lang.org/p/download.html and try the GUI. For any help, just join the Gitter room https://gitter.im/red/red .