This repository creates a Revit add-in that can upgrade Revit files to a newer version. There is a project file for Revit 2017, 2018, 2019, 2020, 2021, 2022, 2023 ...
Copy/paste the .addin file of your Design Automation for Revit plugin into the same folder C:\ProgramData\Autodesk\Revit\Addins\XXXX\. DesignAutomationHandler doesn't support local testing/debugging ...