If this is the first time you are installing Virtual Storage Console for VMware vSphere, you do not need to worry about upgrade issues. You can install VSC using either the installation wizard or silent mode.
Installing VSC for VMware vSphere using silent mode
You can install Virtual Storage Console for VMware vSphere using silent mode instead of the installation wizard. When you use silent mode, you enter a command line that lets you automatically install all of the VSC features at one time.