Click on the Beta app Link that you have received in Pulsar Notification Email.

Click on Download button.

Once appxbundle file is downloaded on your device, Click on the file.

Click Install button to Install Pulsar Beta app on your device.

Save the .appxbundle on the computer you want to install this on

Right-click on the .appxbundle package and select properties.

Under the Digital Signatures tab you should see the test certificate. Click to select the certificate and click on Details button.

Select the button View Certificate.

Select the button Install Certificate.

From the Store Location radio buttons select Local Machine. Click the Next button.

Click Yes on the admin prompt for changes to your device.

On the Certificate Import Wizard chose the radio button Place all certificates in the following store then select the Browse button.

Select the Trusted People certificate store. Then click the OK button.

Click the Next button on the Certificate Import Wizard window.

Click Finish button to complete the certificate install.

You can now close all windows and double click on the .appxbundle file. It should now install properly.