The Smart Client Setup Program will automatically detect if a previous (older) version of the Smart Client is already installed. If so, the first screen (figure 1) of the Setup Assistant will inform you that an update will be installed. If you select Update the update will be installed immediately.
Figure 1: The welcome screen shown if the Setup Program detects an older version of the Smart Client
Figure 2: The progress screen
Figure 3: Screen shown after successfully installing a new version of the Smart Client.