Hi Francois,

The first thing would be as your said the Deactivation process as described here

If you wanted to also migrate the database, you would need to follow this article here as you are using the internal PostgreSQL option. However you would do the restore on the newly installed Pyramid server. If you do not have a lot of content you could also just export and import your content to the new install before you deactivate it. But then you would need to re-setup all the users and other settings again. In the Pyramid repository database remove all the "old" server entries in the table "server_instances" and restart all Pyramid services.

If you're using an IMDB (In-Memory DB), backup the 'imdata' folder to restore to the new server
The default location is: "C:\Program Files\Pyramid 2018\repository\imdata"

• If you're using publications, backup the below folder to have the ability to review and open published publications on the new server:
  "C:\Program Files\Pyramid 2018\repository\general"
• Copy the machine key from config.ini 
  (C:\Program Files\Pyramid 2018\config.ini).
  to copy the machine key to the config.ini on the new server * do this before editing the table "server_instances" and restarting the services as explained above. 
  look for:
  [machine]
  installType=1
  host=myPyramidserver.com
  machineKey=0e93adc283152805cceb676d9a38ec1e