I’ve been using TeamViewer for a couple of years to remotely log into my computers. I started using TeamViewer exclusively after LogMeIn ended their free version of the service. TeamViewer is free as long as it is for personal use.
Recently, I accidently did not select personal use when installing it on my Surface Pro 3. At the end of the trial, I tried to uninstall and reinstall for personal use. This didn’t work.
This afternoon, I found a YouTube video which assisted me with the steps. The video is not in English but it was easy to figure out what was going on with the visuals. In order to complete the fix you will need to download SMAC MAC Address Changer.