Anyone that is using an older version of powershell will not be able to run the scripts by default because Invoke-WebRequest was not available before PowerShell v3.0.
One needs to update PowerShell to at least v3 in order to use this repository in the default state, or changes need to be made to the ps1 scripts to allow it to be backward compatible with PowerShell < v3.0.
The term 'Invoke-WebRequest' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At D:\Git\MagPiDownloader\windows\magpi-issue-downloader.ps1:34 char:28
+ $l = (Invoke-WebRequest <<<< -Uri $baseUrl -usebasicparsing).Links
+ CategoryInfo : ObjectNotFound: (Invoke-WebRequest:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException