The Any% rules state: "Opening Vendor boxes with the mouse (cursor) is NOT allowed". Playing on keyboard, however, I don't see another way to open these boxes, unless I missed something.
I don’t play on PC (obviously), but in Arad’s Any% tutorial video, he mentions using the escape key to open them. Anyone else who’s more familiar with keyboard can probably answer if there’s more keys that work.
It is indeed inconvenient. I apologize Ben. Even if opening the boxes with the mouse is only a minor advantage which can add up by only a few seconds.
Unless more people complain, I won't hold another vote about this Rule.
I don't have problems with the rule itself, I was just confused since alternative box opening methods aren't explained anywhere in the rules.