If you already have Archicad installed, and start the Installation Wizard, you are given two options:
1.Add will add new features to your current installation. You will see all available features in a list and you can check features to be added to your current installation.
2.Repair will reinstall Archicad with the features of your current installation.
•The Repair process will revert your Archicad version to its default settings. After Repair, you must reinstall the latest Archicad and Library updates.
•Project files you saved into the Archicad folder will not be deleted or overwritten by the repair process.