GenSmarts uses the colors you've set up in your Windows display settings.
Right click on your desktop and select PROPERTIES... then the APPEARANCE tab...
The SCHEME: shown are Windows standard color combinations that should work fine. If you see a "blank" SCHEME: it means you (or something on your behalf) have customized the color settings, and that's probably causing the problem. Choose WINDOWS STANDARD for scheme if it's blank and you just want a good default. Press APPLY to make the change.