Alas, on my system (Win10 64-bit) the OpenGL version crashes upon starting a game (selecting that option from the menu). The 7DRL version works though.
Huh. Thanks for that - I'll have an investigate. Slightly concerning... can't drop back to one version just yet!
Does it happen consistently? I found one crash level bug on creating the game, but happens very occasionally - but on both versions.
It does, I've not been able to get the OpenGL version to run beyond the title screen. One issue might be, perhaps, that my laptop has two video cards? An integrated one for battery life and a discrete one for when more muscle is needed.