I have been able to successfully see my styles in the CSS class drop down. When I make changes to the CSS file (out in the Program Files\Common Files\Microsoft Shared\web server extensions\wpresources\RadEditorSharePoint\4.4.1.0__1f131a624888eeed\RadControls directory), refresh my page, I would have exected the styles would be updated to reflect my changes but they are not. I suspect a caching problem. What's the best process to reflect changes in the .css file in the css drop down?