Having trouble installing WinSCP PowerShell module

Question

I'm trying to use the WinSCP PowerShell module on a Windows 7 system. This is what I've done:

1. Installed Windows PowerShell version 5.0.
2. Installed Windows Management Framwork v5.0
3. Started PowerShell as Administrator
4. Executed command Set-ExecutionPolicy Unrestricted
5. Executed command Install-Module -Name WinSCP (which result in no output).
6. Selected Yes when asked to download and install NuGet-anycpu.exe

Finally, I did a sanity check by executing command Open-WinSCPSession, which results in the following error:

  The term 'Open-WinSCPSession' is not recognized as the name of a cmdlet,
  function, script file, or operable program. Check the spelling of the
  name, or if a path was included, verify that the path is correct and try
  again.
  At line:1 char:1

+ Open-WinSCPSession
+ ~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (Open-WinSCPSession:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

This suggests that the module did not install correctly. Any suggestions as to what I've done wrong?