Call the same instance? #170

I'm using this library to wrap an API that needs to be initialized to be used. I can make the init call no problem, but the next call fails, I think because the init call is made against a different instance of the API than I inited.

Is there a way to use InvokeFromFileAsync but have the same instance be the target every time?

Alternately, is there a way to invoke two methods with one call, so I can init every time?