[Busta Uppa]

I switched back to default Estuary in case it was a skin issue, but the old option is missing from there too.

It's not mssing, it was never there. The button is only there because the skinner decided to add the button in whichever skin you are using.

If the button is now missing, you need to ask in your skin thread.

Ah okay, I should have figured this was skin-dependent.  So just now I just switched to one I hadn't used in a while, and sure enough there was an "extras" option in the library artist info, with that lovely Artwork Beef integration.  So I can check with the creator of the other skin, or even just switch skins temporarily to use these beef features.  Works for me - thanks!!