How to install Windows Store Apps Manually

1.Double click certificate file to open Certificate Import Wizard.
2.Select "Local Machine" then click Next.
3.Select "Place all certificates in the following store." and click Browse.
4.Select "Trusted People" to add it.
5.Open Windows Powershell
6.Type "Set-ExecutionPolicy RemoteSigned" and tap Enter to allow execution policy.
7.Type "Show-WindowsDeveloperLicenseRegistration" and tap Enter to enable developer mode.
8.Type "Add-Appxpackage D:\app.appx" and tap Enter to install your app.