Are you in a game when you're doing it? Is the button greyed-out when you're clicking on it?
Start Game
Start DB
Login
Click START on DB, let it load up a game
Once you are in a game, click the STOP button on DB
Click the Plugin button, select Adventurer, Click CONFIG
If the button is grey at this point, select another plugin then click on adventurer again.
If this doesn't work, I would suggest a fresh install of adventurer to see if it helps, if not do the full monty (fresh install of everything.)