Update-GratisDNS PowerShell script

Here's a quick PowerShell script, which can be used as a scheduled task on a Windows computer, to update your GratisDNS.dk DDNS. Requires PowerShell version 3.
Just use the following to command in the scheduled task action: C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -NoLogo -NonInteractive -ExecutionPolicy Unrestricted -File "C:\Scripts\Update-GratisDNS.ps1"