3ds Max 2023 to U.E 5.4 with DataSmith (missing)

Hello community!

I finally found a way to import my 3D projects from 3ds Max 2023 to Unreal Engine 5.4 perfectly. DataSmith!

However, I have the DataSmith function only in one project not in my main project.
What exactly is the reason for this?

I have already uninstalled it, deleted the registry and reinstalled it. But I can only find it in my other projects and not in the one where I need it. :confused:
(It’s enabled in the plugins)

Best regards Robert