I have installed the latest Monkey & Workbench HD. I am using a Mac with Mavericks. When I connect my JTV69 to the computer I get two green lights (yes that means that I have a connection and that a jack is plugged in).
However Monkey won't see the guitar and Workbench says that I need version 2.0 before I can use Workbench HD. (I have used it before now so that's a puzzle). I think that I am on version 1.9.
Any help appreciated.