Hi,

it is kind of “hidden”… at least it is not really intuitive.

You have to create an archive first. That will save your project as a ZIP-file.

Therefore open your project in Experte 4.11 and click “File” -> “Archive” -> “Project+QuadClient (including user passwords)”
In the following “Save As” dialog choose your favorite location.

Open Experte 4.12 and import the ZIP file.

If you have own logics, symbols or plugins you might need to copy them manually.

HTH
Shorty