Not sure if this is the right place but no other forum seemed better.
If I search for 'color browser' in the help system the first link is 'Color Browser - Utilities'. If I then click on that link I get sent to
file:///C:/Program%20Files%20(x86)/Actipro%20Software/WPF-Controls/v21.1.1/Documentation/utilities/utilities/color-browser.html
which is not valid. The correct link appears to be
file:///C:/Program%20Files%20(x86)/Actipro%20Software/WPF-Controls/v21.1.1/Documentation/utilities/color-browser.html
All links in the search appear to be broken. The links in the Topics tab seem to work.