Hey ! How are you doing? Good to hear from you!
Yeah I was just going to reply with that, shaders will need to be updated for each version. I actually haven’t even tried them in 4.11 yet, should probably get around to trying that. 
The Shaders were updated by TK on the 4.11 branch, but for now anyone wanting to use 4.12p3 just ignore the optional shaders, they will be updated for the full 4.12 release.