[quote=KhanAidan]I'm having the same problem on a Windows 7 PC. Divinity Engine 2 Definitive Edition was working just fine last night. It only stopped working after the Steam update today. The classic version still works, but the DE version crashes immediately upon starting it up. [/quote]

I missed the Steam update - left my computer on over lunch, so I imagine it happened then. I'm assuming it's an update to the Divinity Engine 2 tool? It'd explain a lot about why it abruptly stopped working a few hours after I used it last.