Fast Feedback has to do with the way your graphics card is utilized. Turning it off can help improve performance when the GPU doesn't fully support OpenGL.

@michaelsiggers said: I wish it would be fixed. If not, can I get a refund? John Brock has a forum for his products, this is probably a question that should be asked there as he's the only person able to answer that.

Hi Rich I use Thea. I'm not too worried. I've just deleted those two sets. Just bought and downloaded the 'Cyber Monday' Set as well, and the same problem occurs with the 'Wood' Set in that. Kind regards Mike

Thankyou all so much. Thank you @TIG and @Fredo6. Really appreciated. I haven’t updated to the latest OS for Mac yet, and I won’t do for a while yet, as everything is running smoothly at the moment. I will now install the updates to the Extensions though. Once again, thank you. Kind regards Mike