Facebook SSK .NET API Defining Version in 6.8.0

I'm trying to ensure a package will run when V1.0 of the Facebook API is deprecated on 30th April.

I found this link

Facebook SDK for .NET - Specify Graph 2.0+ in API?

which suggests using

fbClient.Version = "v2.2";

I have downloaded the latest 'Facebook SSK .NET' which creates a folder 'Facebook V6.8.0' and details show it as V6.8.0

When I add it as a refernce the Path shows the 6.8 folder but Version in the Properties still shows the 6.0.10.0 my original version used.

Also the Reference does not provide fbClient.Version.

Thanks for any help.

Wyn