DrumsUI - Terrors of Thalumbra update

[Drumstix42]

I'm away on holiday for a bit.

Not sure why the Sets button would be acting different as I didn't change anything with that, but stranger things have happened.

As for the background missing, I'll try to double check the image files are all correct when I'm back. It probably won't be until at least Monday that I can take a peek.
I had to copy and paste layer updates and alpha layer updates to 3 images, across 12 sets, and it's been a while since I've done those updates. So I wouldn't be surprised if I mis-clicked at one point!