MM800 nor lighting up after iCUE update

Hi

I updated iCUE tonight and now my MM800 isn't lighting up. I know the lighting works as it does the default rainbow when the PC boots up, but as soon as iCUE kicks in with lighting sync it turns off.

I've tried removing it through device manager and then reinstalling, but no good. It has the latest firmware. No lighting effects work through iCUE, synced or on it's own. iCUE does detect the mousepad, so that isn't an issue.

Any suggestions? The fans, keyboard, mouse and headset stand all work fine.

Cheers

Nick