The facebook forum is quite active and Mat will respond there. There are a couple of exceptionally skilled non employees who are often more helpful than VPI is.
VPI forum
VPI Forum...I've tried to join more than once and I can't get an activation email. In the help section, it suggests contacting an administrator, but the admin mailbox is full and, as far as I can see, one has to log in to contact the admin within the forum...Catch 22. Can anyone help me muddle through this?