Hi,
registering a device on the desktop using the QR code does not sync the device. It is only used to send phone numbers and locations to the phone so that you can click a contact's phone number on the desktop and call it with your phone.
To sync both you just have to enter the same Google account in the desktop version that you are also using in the Android version of CalenGoo.
Does that work? Please try this and don't hesitate to contact me again if you have any problems or questions!
Kind regards
Dominique Gunia