It should be (or you cna just do Install-Module -Name VMware.PowerCLI).
Btw, Get-PowerCLIVersion is not the ideal way to get the PowerCLI version.
Get-Module -Name VMware* -ListAvailableBlog: http://lucd.info | Twitter: @LucD22 | PowerCLI Reference co-author: http://tinyurl.com/hkn4glz
i did this on vmware HOL though it runs but it seems it would restrict any change there .
checking on some other environement .
Thanks Luc ,
It worked just closed powershell session after running update command .
both get-powercliversion and Get-Module -Name VMware* -ListAvailable gave 11.5 now .