It's still there for me. Was there any particular event or action that make it disappear?
Try a full clean re-install:
- move any valued save games elsewhere
- "delete local content" in Steam-CK2
- in the Steam beta tab pt into the 2.2.0.6 beta
- manually delete all files and folders left under Steam/CK2 AND Documents/Paradox/CK2
- re-install game in Steam, run a Steam Verify when done.