The project website does not indicate any support for WinRT.
Is there a way to do this? We (like many others, presumably) had bet on Vici CoolStorage for its cross-platform capabilities.
A version is in the works that will support .NET 4.5, Windows Phone 8, WinRT (Windows 8), Xamarin.iOS and Xamarin.Android. It will be built as a PCL (portable class library). Support for Windows Phone 7 will be dropped because the platform lacks too many common .NET framework features that are available on other platforms.
This new version will be available early December.