Still awaiting a proper response, Gavin. And I need to state, I just upgraded to Acid Pro 11. When I loaded up SubLab XL within Acid Pro 11, it still doesn’t work. It does exactly the same thing: loads up fine, APPEARS to be in good working order, but when I hit a key nothing happens. The exact same problem as with Acid Pro 10. It looks like you may have to use this situation to initiate a line of communication with Magix and work on this together with them. You might develop a good relationship with them which could lead to working with them in the future, but the main focus is obvious to get SubLab fully operational within the Acid Pro DAW series.