Install App Control server as outlined in Tech Docs > Server > Server Installation Guide > Installing the Server with a Restored or Reconnected Database.
During the install be sure to choose:
Use Existing Database
The Certificates stored in the database or the ones backed up.
Alternatively, if the Server Address was changed as part of the migration task, import or generate new Certificates at this time.
After installation is complete, log in to the Console and confirm Agents are showing as Connected.
At this time the old App Control Server installation should be removed.