I've following instructions to install this custom cordova app that I downloaded.
Unzip the file you downloaded from the Apps section of the Portal.
Right click the Add-AppDevPackage.ps1 file and select Run with PowerShell. Follow the prompts to obtain a developer license and install the certificate.
The problem is, when i tap and hold on the ps1 file and from context menu I don't see Run with PowerShell option?
From this link, https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.security/set-executionpolicy?view=powershell-5.1
i executed following commands.
Set-ExecutionPolicy Unrestricted