In the farmerswife Object Manager > first add via the Object Manager menu button (or right mouse click) the Column: Cirkus. It will show you with Yes or No if the Objects have already been synced.
Make sure to only mark the Object that are not synced > highlight them and do a right mouse click > Cirkus.
If you by mistake have highlighted an Object that is already synced to Cirkus the option to sync to Cirkus does not appear in the menu.