Per https://www.ptc.com/en/support/article/CS49029:


  1. Select Start > All Programs > PTC > Creo Elements/Direct License Server 18.0 > Configure License Server
    • InstallShield Wizard will open
  2. Select Next
  3. Make sure Modify is checked and select Next
  4. Select Next to skip Custom Setup
  5. Select Install
    • The Creo Elements/Direct Licensing Configuration Client dialog box will open
  6. Select the License Configuration tab
  7. Select Create/Edit
    • Windows Notepad will open with the current license configuration file
  8. Copy all data from the license text file sent from PTC and use the paste function to append the licenses to the existing file
  9. Save the file
  10. Select Apply
  11. Select Finish
    • License Configuration Client dialog box will close
  12. Select Finish in the InstallShield Wizard