I had no DLC tab and spent $15.00 more just to add the Divine Ascension DLC.

Now I have a DLC tab but...

https://imgur.com/MSAJqPM

My face afterwards:

https://imgur.com/PP50OaS

PS - I did Kyrone's *fix* and it let me create a project and basic level (so there's that) but it still throws some error messages in the error log and it crash a LOT. Every time I close the Divinity Engine I get the glasses not working message. If I generate a brand new level with a blank new terrain with a base terrain texture and place just a start point and an AI trigger and nothing else (totally virgin level) and try to generate the AI paths it crashes... a few other places too. Massively frustrating that it's not working. Ironically the main game in single player has been crash and bug free fro me so far. Go figure. At least I can play and enjoy the story :)
I really want to mod though :(