1. Enter into your own Skype account from a computer, via the Skype desktop
client.
2. Open a random chat window.
3. Type the following command:
/showplaces
After sending a message, you should receive a response that shows you how
many places you are online. If you show that you are registered in more than
one location, type the following command:
/remotelogout
4. To make sure that you have successfully logged off from all other devices
except the current device, again execute:
/showplaces
again and you should see a message with just one device.