Why should he go through IPP? that is not needed.
When your Personal Environment (PE) is shut down, you get an email from OutSystems with a backup of your applications. This backup is an OutSystems Solution Pack file (.OSP) that contains all the applications you had in your personal environment.
If you have created a new PE, you can login to Service Center via https://<yourpersonalenvironmentname>.outsystemscloud.com/servicecenter and go to Factory >> Solutions >> Upload & Publish a Solution, choose your OSP file and publish it.