How to open a session using ACCPAC.Advantage 63A?

Using ACCPAC.Advantage with vb.net, I was able to open a session by doing the following:

Dim SageSess As New ACCPAC.Advantage.Session
SageSess.Init("", "XY", "XY1000", "62A")
SageSess.Open("ADMIN", "", "XXXXXXX", DateTime.Today, 0)

Now, in version 63A ACCPAC.Advantage.Session throws an error because Session is not  a member of ACCPAC.Advantage (Type 'ACCPAC.Advantage.Session' is not defined)

Where can I find documentation for version 63A?

Thanks,