Tom: what problem are you experiencing? The direct URL is
http://www.fastcheck.org/download/FCInst_2_1_0_0.exe
Sherry: The theme support is very basic at the moment - you can only specify 1 theme. To change the theme, you need to change the theme.ini file and restart FC. In a next version I'll improve the theming, with a list of available themes, and the possibility to change without restarting. At the moment, this is really a first implementation. As you can see, the "theme" option page is pretty empty...
Eric