It already works! In the Flic app you have to choose "Phone Control > iBooks" and add it. Then the page turning works with ForeScore too. If the item "iBooks" is not shown you have an old Flic button. This happens to me. Ask the support to send you a new one. They were very friendly. A week later I got a new button and now I am happy.
Best posts made by mgs.allegretto
For musicians: Turning pages with ForeScore and Flic