Solution to the Envelopes

The envelopes can be stacked like so to make them all true.

Directly below me is a folder with green either as its background or as its label.

If I am 4th in the stack, then the folder with the same name as my label contains your next location.

Directly above me is a folder with red either as its label or as its name, and directly below me is a folder with black either as its background or as its label.

If I am 2nd in the stack, then the folder with the same label as my background contains your next location.

Directly above me is a folder with yellow either as its name or as its background, and directly below me is a folder with blue either as its label or its background.

If I am 4th in the stack, then the folder with the same label as my background contains your next location.

Adjacent to me is a folder with red either as its label or as its name.

If I am last in the stack, then the folder with the same name as my label contains your next location.

Directly above me is a folder with green either as its name or as its background.

If I am 3rd in the stack, then the folder with the same label as my background contains your next location.

The second envelope (with the blue background) points to the envelope with the blue label, which is the envelope with the black background. That is the one you should open.

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