I installed the demo and the first thing that I noticed was that the A4 (note 69) on the GT Principal 8 in all perspectives seems to be using the sample of the Bb above it, or is otherwise up by half a semitone. The HW voicing settings can only lower the pitch by 50 cents, which isn't enough to put it back in tune.
Since no one else seems to have mentioned this in the month that it's been released, is this an error with my installation? I followed the instructions at
https://llannerchorgans.square.site/blackburn-cathedral.
Edit: I hadn't set the temperament to Equal, after doing so the problem fixed itself.