Pressing Ctrl+F5 recovered the Clocks Tool.
Thanks a lot for your answer.
Hello,
today we updated the Pins&Clocks applications. In case you were using it at that time, it may have ended in wrong state. If you force the browser to refresh everything using Ctrl+F5 is it still reproducible? If yes, could you please post which browser/version and operating system you use?
Thank you and regards,
Libor