It's there now Piran Jade, just go to steam then if you go hover over the library you'll see a tools tab. Click that and then select The Divinity Engine
i found it thanks to this. for the steam version follow Garod (quoted here). it is on there you just have to look for it. i wish that it was more clear on how to find it because this is the only post on the whole internet that even looks at this issue. THANK YOU i was about to give up on this
