Marta here, from Trello Support.
You'll be able to see that option in case you're a board member. This is what you should see after clicking on the board's menu > more...
You can check if you're a board member by having a look at the board's menu top section. If you're not, you should see a "Join Board" button.
I hope that helps!
In my case I needed to update Google Chrome to the latest update. (Or that's what fixed it anyway.) It wasn't just reloading the tab, or even closing the tab, reopening and re-logging in.
I'm not sure what context was changed that would have effected Trello's menu offerings, but that did it.
Update: Nope, it was there for a moment, then didn't try to print/queue anything, then vanished. The More... menu is fine, there's just no Print/Export option in the list.
Update: Turn off ad blockers. In Chrome if you disable the Adblock Plus extension which I had installed, then the menu comes back. Re-enable ad blocking and the menu goes away again.
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