Larian Studios Forums Divinity: Original Sin 2 - The Modding Dungeon Divinity - Original Sin 2 - Modding Troubleshooting DLC tab unavailable/missing in game properties

So I registered because I had the same problem and I found a overly complicated to figure out fix that appears simple enough!

1) Open steam console by typing:
"steam://nav/console"
into URL bar which should open steam as an external app and not use your favorite search engine.

2) Type "download_depot 435150 717550" into the console (717550 is the engine data dlc and 435150 is the appid of DOS2)

3) Wait for it to finish download... it takes a while (Took 1 hour for me)

3) Goto "*STEAM*/steamapps\content\app_435150\depot_717550" and copy/cut/merge the "data" folder into "*STEAM*\steamapps\common\Divinity Original Sin 2"