I'm not one of their users but I did some digging and it looks like apart from their "export recent trade history ^{[limited to 3 months at most]}" there's also another button beside/above it that says "generate all trade statements ^{[limited to a year at most]}".

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You might get more responses if you move this thread to the "Exchanges" board instead.
^{- Move button is in the bottom left corner of the page.}