Can you give us more information on your application scenario? Do you have an already developed application with an older version of OpenAccess and you are trying to upgrade to a new one? Or is this a fresh application where you are just trying to use the latest version of OpenAccess?
I would suggest you to use the UpgradeReferences menu entry in Visual Studio and to recompile your solution so the latest OpenAccess assemblies that you have installed are used and the search for the older ones is not necessary.
the Telerik team