I see - so rendering a textured quad of any description isn't working on AMD for some reason. AE will be optional eventually, I'm in the middle of rewriting the FS stuff after which it will become more robust.
No one in the dev team has an AMD GPU so not sure what the best way to debug this is.
Maybe try this build:
https://ci.appveyor.com/project/paul...semr/artifacts
Switched to SDL_GL_CONTEXT_PROFILE_CORE which is a stab in the dark fix :P