You can also upgrade the BFI project file manually. To perform the upgrade, you need to take the BFI 23.1 project file and reapply any customizations you have made.
These customizations could include, but are not limited to:
Additional classes you have created
Additional fields you have created
Additional script you have added, including code in UserExits
Additional Verifier forms or Verifier form layouts you have created
Once you have re-applied your customizations to the BFI 23.1 project file, you should save your changes and use this new project file in your active project file.