Need to uninstall prvious versions of software before installing a newer version
EcoStruxure Control Expert
You will not need to manually uninstall previous versions of Unity Pro as the newer install will automatically do it for you.
(If installing an earlier version of Unity Pro, uninstall the existing version.)
*Note: Please ensure that you have complete backups (ZEF, XEF or STA) of all your programs prior to installing the newer version of Unity Pro.
*Note: It is not possible to have multiple versions of Unity Pro installed on a single PC.