Entering e.g. help in the search field "Application Name" offers hits like "kioslave/help" or "kioslave5/help", but selecting any "kioslave[5]/*" entry gives the error "The application kioslave5 could not be found. Please check if you entered the name correctly, or use the navigation on the left to access the complete KDE User Documentation"
It may be related to some new code introduced for security enforcement some time ago, but I thought I handled this case too :/