Yep.. the new file structure at the end of that file chain is now "blast-furnace-base.png" followed by "-fire.png", "-shadow.png" and "-working-light.png".. so an update broke it.
Finally got some time to fix it, sorry it took so long, but I've released version 1.5.0 for Factorio 1.1. It now should work with the latest version of Angel's Smelting. Keep in mind that Shiny angel GFX has not been updated, once it does it will probably give the same issue as this, so I recommend to disable the shiny gfx option for now.
