If you already have MEP Designer 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 MEP Designer with the features of your current installation.
•The Repair process will revert your MEP Designer version to its default settings. After Repair, you must reinstall the latest MEP Designer and Library updates.
•Project files you saved into the MEP Designer folder will not be deleted or overwritten by the repair process.