MarginNote Keeps asking me to re-purchase

Does any one have the same issue here? I have bought MarginNote on my Ipad, and it keeps asking me to re-purchase this item on Imac. When I try the trial button on imac, it says I have already purchased this item, I should re-download it and continue using this for free. But the purchasing window still pops up every time I edit the document.


Given that iOS and macOS are of two separate operating platforms, iOS and macOS apps are sold separately. The purchase of the macOS app (be it license version or the one from the Mac AppStore) can't be used on the iOS AppStore, and vice versa.

Kind Regards,
Support Team