If you want to "lock-down" Circle Dock and prevent any alterations to it, enter a password (twice)
and click on the Enable Kiosk Mode button. Note that case IS significant and the same
password/phrase should be entered on each occasion.
You can also make the Taskbar hide whilst Circle Dock is running by enabling Hide Taskbar.
Note that you can toggle the Taskbar's visibility from the Centre Button's drop-down menu -
except in Kiosk Mode!