Hi @Gavin_FAW I hope you’re well and in good health. I was in a panic over SubLab XL not working because I’m going through a lot at the moment and my music production is really helping me pull through it all in one piece. I was really looking forward to using SubLab XL to make some intense sub glides for some new drill beats I’m making only to find it does nothing. I hope with the detailed information I have provided together with a hazard guess at where you might find the solution, SubLab XL will be up and running on Acid Pro 11 in no time. You might also want to look into what’s up with the later versions of the original SubLab re: what went wrong after v1.1.3 whilst at it and do another update for the original SubLab too so v1.1.9 or whatever comes next has been repatched to work again. Please keep me informed about what’s going on. It would be nice to at least keep updated as to how long you think this might take; I presume it shouldn’t take long if I am onto something regarding the script coding for the original SubLab v1.1.3